High Accuracy and Low Regret for User-Cold-Start Using Latent Bandits

no code implementations • 12 May 2023 • David Young, Douglas Leith

We develop a novel latent-bandit algorithm for tackling the cold-start problem for new users joining a recommender system.

Recommendation Systems

Bandit Convex Optimisation Revisited: FTRL Achieves $\tilde{O}(t^{1/2})$ Regret

no code implementations • 1 Feb 2023 • David Young, Douglas Leith, George Iosifidis

We show that a kernel estimator using multiple function evaluations can be easily converted into a sampling-based bandit estimator with expectation equal to the original kernel estimate.

Development status of the UV-VIS detector system of SOXS for the ESO-NTT telescope

no code implementations • 23 Dec 2020 • Rosario Cosentino, Marcos Hernandez, Hector Ventura, Sergio Campana, Riccardo Claudi, Pietro Schipani, Matteo Aliverti, Andrea Baruffolo, Sagi Ben Ami, Federico Biondi, Giulio Capasso, Francesco D'Alessio, Paolo D'Avanzo, Ofir Hershko, Hanindyo Kuncarayakti, Marco Landoni, Matteo Munari, Giuliano Pignata, Adam Rubin, Salvatore Scuderi, Fabrizio Vitali, David Young, Jani Achren, Jose Antonio Araiza Duran, Iair Arcavi, Anna Brucallassi, Rachel Bruch, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Marco De Pascale, Rosario Di Benedetto, Sergio D'Orsi, Avishay Gal Yam, Matteo Genoni, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Michael Rappaport, Kalyan Radhakrishnan, Davide Ricci, Marco Riva, Bernardo Salasnich, Stephen Smartt, Ricardo Zanmar Sanchez, Maximilian Stritzinger, Matteo Accardo, Leander H. Mehrgan, Derek Ives, Josh Hopgood

The first tests of the detector system with the UV-VIS camera will be shown.

Instrumentation and Methods for Astrophysics

Design and development of the SOXS calibration unit

no code implementations • 23 Dec 2020 • Hanindyo Kuncarayakti, Jani Achren, Sergio Campana, Riccardo Claudi, Pietro Schipani, Matteo Aliverti, Andrea Baruffolo, Sagi Ben-Ami, Federico Biondi, Giulio Capasso, Rosario Cosentino, Francesco D'Alessio, Paolo D'Avanzo, Ofir Hershko, Marco Landoni, Matteo Munari, Giuliano Pignata, Adam Rubin, Salvatore Scuderi, Fabrizio Vitali, David Young, Jose Antonio Araiza-Duran, Iair Arcavi, Anna Brucalassi, Rachel Bruch, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Marco De Pascale, Rosario Di Benedetto, Sergio D'Orsi, Avishay Gal-Yam, Matteo Genoni, Marcos Hernandez, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Kalyan Radhakrishnan, Michael Rappaport, Davide Ricci, Marco Riva, Bernardo Salasnich, Stephen Smartt, Ricardo Zanmar Sanchez, Maximilian Stritzinger, Hector Ventura

The calibration unit will employ seven calibration lamps: a quartz-tungsten-halogen and a deuterium lamp for the flat-field correction, a ThAr lamp and four pencil-style rare-gas lamps for the wavelength calibration.

Instrumentation and Methods for Astrophysics

Development status of the SOXS instrument control software

no code implementations • 23 Dec 2020 • Davide Ricci, Andrea Baruffolo, Bernardo Salasnich, Marco De Pascale, Sergio Campana, Riccardo Claudi, Pietro Schipani, Matteo Aliverti, Sagi Ben-Ami, Federico Biondi, Giulio Capasso, Rosario Cosentino, Francesco D'Alessio, Paolo D'Avanzo, Ofir Hershko, Hanindyo Kuncarayakti, Marco Landoni, Matteo Munari, Giuliano Pignata, Kalyan Radhakrishnan, Adam Rubin, Salvatore Scuderi, Fabrizio Vitali, David Young, Jani Achrén, José Antonio Araiza-Duran, Iair Arcavi, Anna Brucalassi, Rachel Bruch, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Rosario Di Benedetto, Sergio D'Orsi, Avishay Gal-Yam, Matteo Genoni, Marcos Hernandez, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Michael Rappaport, Marco Riva, Stephen Smartt, Ricardo Zanmar Sanchez, Maximilian Stritzinger, Hector Ventura

SOXS (Son Of X-Shooter) is a forthcoming instrument for ESO-NTT, mainly dedicated to the spectroscopic study of transient events and is currently starting the AIT (Assembly, Integration, and Test) phase.

Instrumentation and Methods for Astrophysics

Progress on the UV-VIS arm of SOXS

no code implementations • 23 Dec 2020 • Adam Rubin, Sagi Ben-Ami, Ofir Hershko, Michael Rappaport, Avishay Gal-Yam, Rachel Bruch, Sergio Campana, Riccardo Claudi, Pietro Schipani, Matteo Aliverti, Andrea Baruffolo, Federico Biondi, Giulio Capasso, Rosario Cosentino, Francesco D'Alessio, Paolo D'Avanzo, Hanindyo Kuncarayakti, Marco Landoni, Matteo Munari, Giuliano Pignata, Salvatore Scuderi, Fabrizio Vitali, David Young, Jani Achrén, José Antonio Araiza-Duran, Iair Arcavi, Anna Brucalassi, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Marco De Pascale, Rosario Di Benedetto, Sergio D'Orsi, Thomas Flügel-Paul, Matteo Genoni, Marcos Hernandez, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Kalyan Radhakrishnan, Davide Ricci, Marco Riva, Susann Sadlowski, Bernardo Salasnich, Stephen Smartt, Ricardo Zanmar Sanchez, Maximilian Stritzinger, Hector Ventura

We present our progress on the UV-VIS arm of Son Of X-Shooter (SOXS), a new spectrograph for the NTT.

Instrumentation and Methods for Astrophysics

SOXS: Effects on optical performances due to gravity flexures, temperature variations, and subsystems alignment

no code implementations • 23 Dec 2020 • Ricardo Zanmar Sanchez, Matteo Aliverti, Matteo Munari, Sergio Campana, Riccardo Claudi, Pietro Schipani, Andrea Baruffolo, Sagi Ben-Ami, Federico Biondi, Giulio Capasso, Rosario Cosentino, Francesco D'Alessio, Paolo D'Avanzo, Ofir Hershko, Hanindyo Kuncarayakti, Marco Landoni, Giuliano Pignata, Adam Rubin, Salvatore Scuderi, Fabrizio Vitali, David Young, Jani Achrén, José Antonio Araiza-Duran, Iair Arcavi, Anna Brucalassi, Rachel Bruch, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Marco De Pascale, Rosario Di Benedetto, Sergio D'Orsi, Avishay Gal-Yam, Matteo Genoni, Marcos Hernandez, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Michael Rappaport, Kalyan Radhakrishnan, Davide Ricci, Marco Riva, Bernardo Salasnich, Stephen Smartt, Maximilian Stritzinger, Hector Ventura

SOXS (Son Of X-Shooter) is the new medium resolution wide-band spectrograph to be installed at the 3. 6m New Technology Telescope (NTT) in La Silla.

Instrumentation and Methods for Astrophysics

The AIV strategy of the Common Path of Son of X-Shooter

no code implementations • 23 Dec 2020 • Federico Biondi, Kalyan Kumar Radhakrishnan Santhakumari, Riccardo Claudi, Matteo Aliverti, Luca Marafatto, Davide Greggio, Marco Dima, Gabriele Umbriaco, Nancy Elias-Rosa, Sergio Campana, Pietro Schipani, Andrea Baruffolo, Sagi Ben-Ami, Giulio Capasso, Rosario Cosentino, Francesco D'Alessio, Paolo D'Avanzo, Ofir Hershko, Hanindyo Kuncarayakti, Marco Landoni, Matteo Munari, Giuliano Pignata, Adam Rubin, Salvatore Scuderi, Fabrizio Vitali, David Young, Jani Achrén, José Antonio Araiza-Durán, Iair Arcavi, Anna Brucalassi, Rachel Bruch, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Marco De Pascale, Rosario Di Benedetto, Sergio D'Orsi, Avishay Gal-Yam, Matteo Genoni, Marcos Hernandez Diaz, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Michael Rappaport, Davide Ricci, Marco Riva, Bernardo Salasnich, Stephen Smartt, Ricardo Zánmar Sánchez, Maximilian Stritzinger, Héctor Pérez Ventura

Son Of X-Shooter (SOXS) is a double-armed (UV-VIS, NIR) spectrograph designed to be mounted at the ESO-NTT in La Silla, now in its Assembly Integration and Verification (AIV) phase.

Instrumentation and Methods for Astrophysics