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Synchronisation of wireless inertial measurement units in human movement analysis is often achieved using event-based synchronisation techniques. However, these techniques lack precise event generation and accuracy. An inaccurate…

Systems and Control · Electrical Eng. & Systems 2025-06-02 Andreas Spilz , Michael Munz

Environmental neutrons are a source of background for rare event searches (e.g., dark matter direct detection and neutrinoless double beta decay experiments) taking place in deep underground laboratories. The overwhelming majority of these…

Responding to calls from the National Science Foundation (NSF) for new proposals to measure the gravitational constant $G$, we offer an interesting experiment in deep space employing the classic gravity train mechanism. Our setup requires…

General Relativity and Quantum Cosmology · Physics 2016-05-18 Michael R. Feldman , John D. Anderson , Gerald Schubert , Virginia Trimble , Sergei Kopeikin , Claus Lämmerzahl

In recent years there appeared a need for astronomical observations timed with sub-millisecond accuracy. These include e.g. timing stellar occultations by small, sub-km or fast Near Earth Asteroids, but also tracking artificial satellites…

Instrumentation and Methods for Astrophysics · Physics 2023-03-01 K. Kamiński , C. Weber , A. Marciniak , M. Żołnowski , M. Gędek

General relativity predicts that clocks run more slowly near massive objects. The effect is small---a clock at sea level lags behind one 1000 m above sea level by only 9.4 ns/day. Here, we demonstrate that a measurement of this effect can…

Since 2012, thanks to the installation of the high resolution echelle spectrograph in the optical range HARPS-N, the Italian telescope TNG (La Palma) became one of the key facilities for the study of the extrasolar planets. In 2014 TNG also…

The desirability of the mid-band frequency range (1 - 10 GHz) for federal and commercial applications, combined with the growing applications for commercial indoor use-cases, such as factory automation, opens up a new approach to spectrum…

Signal Processing · Electrical Eng. & Systems 2025-10-01 Hossein Nasiri , Muhammad Iqbal Rochman , Monisha Ghosh

The project of a large underground experiment (NOE) devoted to long baseline neutrino oscillation measurement is presented. The apparatus is composed by calorimetric modules interleaved with TRD modules and has been optimized to be…

High Energy Physics - Experiment · Physics 2009-09-25 Paolo Bernardini , Giancarlo Barbarino , Fausto Guarino

We present a method to improve the accuracy of a zero-velocity-aided inertial navigation system (INS) by replacing the standard zero-velocity detector with a long short-term memory (LSTM) neural network. While existing threshold-based…

Robotics · Computer Science 2019-08-14 Brandon Wagstaff , Jonathan Kelly

Global navigation satellite systems (GNSS) are vulnerable to spoofing attacks, with adversarial signals manipulating the location or time information of receivers, potentially causing severe disruptions. The task of discerning the spoofing…

Cryptography and Security · Computer Science 2025-05-12 Wenjie Liu , Panos Papadimitratos

Neural network (NN) emulators of the global 21 cm signal need emulation error much less than the observational noise in order to be used to perform unbiased Bayesian parameter inference. To this end, we introduce $\texttt{21cmLSTM}$ -- a…

Cosmology and Nongalactic Astrophysics · Physics 2024-10-11 J. Dorigo Jones , S. M. Bahauddin , D. Rapetti , J. Mirocha , J. O. Burns

In deep underground laboratories, environmental neutrons, which are produced at the cavern walls, introduce a source of background to rare event searches. The flux and spectrum of the ambient neutrons vary considerably with time and…

Instrumentation and Detectors · Physics 2025-12-17 Melih Solmaz , Klaus Eitel , Alfredo Davide Ferella , Felix Kratzmeier , Francesco Pompa , Kathrin Valerius

Data fusion algorithms that employ LiDAR measurements, such as Visual-LiDAR, LiDAR-Inertial, or Multiple LiDAR Odometry and simultaneous localization and mapping (SLAM) rely on precise timestamping schemes that grant synchronicity to data…

Robotics · Computer Science 2022-09-14 Marsel Faizullin , Anastasiia Kornilova , Gonzalo Ferrer

The use of ultra-precise optical clocks in space ("master clocks") will allow for a range of new applications in the fields of fundamental physics (tests of Einstein's theory of General Relativity, time and frequency metrology by means of…

Global Positioning System (GPS) is a satellite network that transmits regularly encoded information and makes it possible to pinpoint the exact location on Earth by measuring the distance between satellites and the receiver. While GPS…

Systems and Control · Computer Science 2018-03-23 Mehmet Serdar Güzel , Erkan Meral

According to the Einstein's theory of relativity, the passage of time changes in a gravitational field. On earth, raising a clock by one centimetre increases its tick rate by 1.1 parts in 10$^{18}$, enabling optical clocks to perform…

Recently, location-based services (LBS) have steered attention to indoor positioning systems (IPS). WLAN-based IPSs relying on received signal strength (RSS) measurements such as fingerprinting are gaining popularity due to proven high…

Networking and Internet Architecture · Computer Science 2019-07-02 Erick Schmidt , David Akopian

Ultra-sensitive in-beam gamma-ray spectroscopy studies for nuclear astrophysics are performed at the LUNA (Laboratory for Underground Nuclear Astrophysics) 400 kV accelerator, deep underground in Italy's Gran Sasso laboratory. By virtue of…

Gaseous detectors have long been used by particle physics experiments at beamlines or standalone experiments. Recently, their low momentum threshold has made them interesting as active targets for long baseline neutrino experiments. To…

Instrumentation and Detectors · Physics 2019-11-13 Philip Hamacher-Baumann