Results 81 to 90 of about 139,917 (298)

Realfast: Real-Time, Commensal Fast Transient Surveys with the Very Large Array

, 2018
Radio interferometers have the ability to precisely localize and better characterize the properties of sources. This ability is having a powerful impact on the study of fast radio transients, where a few milliseconds of data is enough to pinpoint a ...
Bower, G. C., Burke-Spolaor, S., Butler, B. J., Demorest, P., Halle, A., Khudikyan, S., Law, C. J., Lazio, T. J. W., Pokorny, M., Robnett, J., Rupen, M.   +10 more
core   +1 more source

An Adaptive Human Pilot Model With Reaction Time Delay for Enhanced Adaptive Control in Piloted Systems

International Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces an adaptive human pilot model that captures pilot time‐delay effects in adaptive control systems. The model enables the prediction of pilot–controller interactions, facilitating safer integration and improved design of adaptive controllers for piloted applications.
Abdullah Habboush, Yildiray Yildiz
wiley   +1 more source

A Comprehensive Study of the Energy and Redshift Distributions of the Fast Radio Burst Population Based on the First CHIME/FRB Catalog

The Astrophysical Journal
Fast radio bursts (FRBs) are brief, high-energy bursts of radio waves from extragalactic sources, and their origin remains an open question. In this paper, we perform a comprehensive analysis of the FRB population using the first CHIME/FRB catalog ...
Qing-Zhen Lei, Xin-Zhe Wang, Can-Min Deng   +2 more
doaj   +1 more source

Towards 4U 1630-47: a black-hole soft X-ray transient odyssey [PDF]

, 1998
4U 1630-47 is a black-hole X-ray transient with one of the shortest recurrence times. Despite its regular outburst behaviour little is known about this source. Only recently has attention to this system increased.
Kuulkers, Erik
core   +4 more sources

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

Modeling Current and Future High-cadence Surveys of Repeating Fast Radio Burst Populations

The Astrophysical Journal
In recent years, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) interferometer has revealed a large number of fast radio bursts (FRBs), including a sizable population that demonstrates repeating behavior.
Kyle McGregor, Duncan R. Lorimer
doaj   +1 more source

Measurements of the Crab Pulsar’s Giant Radio Pulse Amplitude Power-law Index Using Low-frequency Arecibo and Green Bank Telescope Observations

The Astrophysical Journal, 2023
We report two low-frequency measurements of the power-law index for the amplitudes of giant radio pulses from the Crab pulsar. The two observations were taken with the Arecibo and Green Bank radio telescopes at center frequencies of 327 MHz and 350 MHz ...
Fronefield Crawford, T. Joseph W. Lazio, Alexander McEwen, Julia S. Deneva, James M. Cordes, Laura Spitler, Ryan F. Trainor   +6 more
doaj   +1 more source

SubmilliJansky Transients in Archival Radio Observations [PDF]

, 2007
[ABRIDGED] We report the results of a 944-epoch survey for transient sources with archival data from the Very Large Array spanning 22 years with a typical epoch separation of 7 days.
Alberto Bolatto, Alexei V. Filippenko, Amy S. W., Clark B. G., Daniel Perley, de Bruyn A. G., Destry Saul, Galama T. J., Geoffrey C. Bower, Joshua S. Bloom, Ryan J. Foley, Voges W.   +11 more
core   +2 more sources

A search for variable and transient radio sources in the extended Chandra Deep Field South at 5.5 GHz [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We present a three epoch survey for transient and variables in the extended Chandra Deep Field South at 5.5 GHz with the Australia Telescope Compact Array. A region covering $\sim$0.3 deg$^{2}$ was observed on timescales of 2.5 months and 2.5 years and typical sensitivities 12.1 $-$ 17.1 $ $Jy beam$^{-1}$ (1$ $) were achieved.
Bell, M., Huynh, M., Hancock, Paul, Murphy, T., Gaensler, B., Burlon, D., Trott, C., Bannister, K.   +7 more
openaire   +3 more sources

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source