Zobrazeno 1 - 10
of 866
pro vyhledávání: '"P Leopardi"'
Autor:
Leopardi, Paul
This paper addresses the idea of the applicability of mathematics, using, as a case study, a construction and software package that partition the unit sphere into regions of equal area. The paper assesses the applicability of this construction and so
Externí odkaz:
http://arxiv.org/abs/2408.13434
Autor:
Gosalia, Ronakraj K., Aguinaldo, Ryan, Green, Jonathan, Leopardi, Holly, Brereton, Peter, Malaney, Robert
The next generation of space-based networks will contain optical clocks embedded within satellites. To fully realize the capabilities of such clocks, high-precision clock synchronization across the networks will be necessary. Current experiments have
Externí odkaz:
http://arxiv.org/abs/2407.00899
Autor:
Tomio, Hannah, Yang, Guangning, Leopardi, Holly F., Numata, Kenji, Yu, Anthony W., Attar, Andrew, Xu, Xiaozhen, Lu, Wei, Gramling, Cheryl, Sridharan, T. K., Kurczynski, Peter
In this effort, we demonstrate the performance of a highly stable time reference for the proposed Black Hole Explorer (BHEX) mission, a space-based extension to the Event Horizon Telescope (EHT) Very Long Baseline Interferometry (VLBI) project. This
Externí odkaz:
http://arxiv.org/abs/2406.10222
Autor:
Ronakraj K. Gosalia, Ryan Aguinaldo, Jonathan Green, Holly Leopardi, Peter Brereton, Robert Malaney
Publikováno v:
APL Photonics, Vol 9, Iss 10, Pp 100903-100903-22 (2024)
The next generation of space-based networks for communications, sensing, and navigation will contain optical clocks embedded within satellites. To fully realize the capabilities of such clocks, high-precision clock synchronization across the networks
Externí odkaz:
https://doaj.org/article/ef429dbf433b4a8fb63fc85be9f3f5a3
Optical frequency combs are an essential tool for precision metrology experiments ranging in application from remote spectroscopic sensing of trace gases to the characterization and comparison of optical atomic clocks for precision time-keeping and s
Externí odkaz:
http://arxiv.org/abs/2208.12869
Autor:
Kim, May E., McGrew, William F., Nardelli, Nicholas V., Clements, Ethan R., Hassan, Youssef S., Zhang, Xiaogang, Valencia, Jose L., Leopardi, Holly, Hume, David B., Fortier, Tara M., Ludlow, Andrw D., Leibrandt, David R.
Comparisons of high-accuracy optical atomic clocks \cite{Ludlow2015} are essential for precision tests of fundamental physics \cite{Safronova2018}, relativistic geodesy \cite{McGrew2018, Grotti2018, Delva2019}, and the anticipated redefinition of the
Externí odkaz:
http://arxiv.org/abs/2109.09540
Autor:
Elena Colombino, Davide Lelli, Sabrina Canziani, Giuseppe Quaranta, Cristina Guidetti, Stefania Leopardi, Serena Robetto, Paola De Benedictis, Riccardo Orusa, Mitzy Mauthe von Degerfeld, Maria Teresa Capucchio
Publikováno v:
BMC Veterinary Research, Vol 19, Iss 1, Pp 1-11 (2023)
Abstract Background Bats are recognized as reservoir species for multiple viruses. However, little is known on bats’ health and mortality. Thus, this study aimed to investigate the main causes of death of bats from Turin province (North-western Ita
Externí odkaz:
https://doaj.org/article/2d0ab3aeba9e466ba111f475ef5b8e99
Autor:
Newman, Zachary L., Maurice, Vincent, Fredrick, Connor, Fortier, Tara, Leopardi, Holly, Hollberg, Leo, Diddams, Scott A., Kitching, John, Hummon, Matthew T.
We describe a high-performance, compact optical frequency standard based on a microfabricated Rb vapor cell and a low-noise, external cavity diode laser operating on the Rb two-photon transition at 778 nm. The optical standard achieves an instability
Externí odkaz:
http://arxiv.org/abs/2105.00610
Autor:
Gábor E. Tóth, Adam J. Hume, Ellen L. Suder, Safia Zeghbib, Ágota Ábrahám, Zsófia Lanszki, Zsaklin Varga, Zsófia Tauber, Fanni Földes, Brigitta Zana, Dino Scaravelli, Maria Teresa Scicluna, Andrea Pereswiet-Soltan, Tamás Görföl, Calogero Terregino, Paola De Benedictis, Isabel Garcia-Dorival, Covadonga Alonso, Ferenc Jakab, Elke Mühlberger, Stefania Leopardi, Gábor Kemenesi
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-7 (2023)
Abstract Lloviu cuevavirus (LLOV) was the first identified member of Filoviridae family outside the Ebola and Marburgvirus genera. A massive die-off of Schreibers’s bats (Miniopterus schreibersii) in the Iberian Peninsula in 2002 led to its initial
Externí odkaz:
https://doaj.org/article/117063f0091e464294ee682425844fa2
Autor:
Bodine, Martha I., Deschênes, Jean-Daniel, Khader, Isaac H., Swann, William C., Leopardi, Holly, Beloy, Kyle, Bothwell, Tobias, Brewer, Samuel M., Bromley, Sarah L., Chen, Jwo-Sy, Diddams, Scott A., Fasano, Robert J., Fortier, Tara M., Hassan, Youssef S., Hume, David B., Kedar, Dhruv, Kennedy, Colin J., Koepke, Amanda, Leibrandt, David R., Ludlow, Andrew D., McGrew, William F., Milner, William R., Nicolodi, Daniele, Oelker, Eric, Parker, Thomas E., Robinson, John M., Romish, Stefania, Schäffer, Stefan A., Sherman, Jeffrey A., Sonderhouse, Lindsay, Yao, Jian, Ye, Jun, Zhang, Xiaogang, Newbury, Nathan R., Sinclair, Laura C.
Publikováno v:
Phys. Rev. Research 2, 033395 (2020)
We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5 km open-air link. Our free-space measurement is
Externí odkaz:
http://arxiv.org/abs/2006.01306