Zobrazeno 1 - 10
of 17 202
pro vyhledávání: '"P, Sheppard"'
Integer geometry on a plane deals with objects whose vertices are points in $\mathbb Z^2$. The congruence relation is provided by all affine transformations preserving the lattice $\mathbb Z^2$. In this paper we study circumscribed circles in integer
Externí odkaz:
http://arxiv.org/abs/2412.04662
Autor:
Hsieh, Henry H., Noonan, John W., Kelley, Michael S. P., Bodewits, Dennis, Pittichova, Jana, Thirouin, Audrey, Micheli, Marco, Knight, Matthew M., Bannister, Michele T., Chandler, Colin O., Holt, Carrie E., Hopkins, Matthew J., Kim, Yaeji, Moskovitz, Nicholas A., Oldroyd, William J., Patterson, Jack, Sheppard, Scott S., Tan, Nicole, Trujillo, Chadwick A., Ye, Quanzhi
We report the detection of water vapor associated with main-belt comet 358P/PANSTARRS on UT 2024 January 8-9 using the NIRSPEC instrument aboard JWST. We derive a water production rate of Q(H2O)=(5.0+/-0.2)x10^25 molecules/s, marking only the second
Externí odkaz:
http://arxiv.org/abs/2411.07435
Autor:
Strauss, Ryder, McNeill, Andrew, Trilling, David E., Valdes, Francisco, Bernardinell, Pedro H., Fuentes, Cesar, Gerdes, David W., Holman, Matthew J., Juric, Mario, Lin, Hsing Wen, Markwardt, Larissa, Mommert, Michael, Napier, Kevin J., Oldroyd, William J., Payne, Matthew J., Rivkin, Andrew S., Schlichting, Hilke E., Sheppard, Scott S., Smotherman, Hayden, Trujillo, Chadwick A, Adams, Fred C., Chandler, Colin Orion
Publikováno v:
The Astronomical Journal, Volume 168, Number 4 (2024)
Superfast rotators (SFRs) are small solar system objects that rotate faster than generally possible for a cohesionless rubble pile. Their rotational characteristics allow us to make inferences about their interior structure and composition. Here, we
Externí odkaz:
http://arxiv.org/abs/2410.01147
Autor:
Sheppard, Scott, Tholen, David, Brozovic, Marina, Jacobson, Robert, Trujillo, Chadwick, Lykawka, Patryk Sofia, Alexandersen, Mike
We have conducted extremely ultra-deep pencil beam observations for new satellites around both Uranus and Neptune. Tens of images on several different nights in 2021, 2022 and 2023 were obtained and shifted and added together to reach as faint as 26.
Externí odkaz:
http://arxiv.org/abs/2410.00108
Autor:
Cheng, Si, Blanco, Magali N., Larson, Timothy V., Sheppard, Lianne, Szpiro, Adam, Shojaie, Ali
Dimension reduction is often the first step in statistical modeling or prediction of multivariate spatial data. However, most existing dimension reduction techniques do not account for the spatial correlation between observations and do not take the
Externí odkaz:
http://arxiv.org/abs/2408.01662
Selective plane illumination microscopy (SPIM) is an optical sectioning imaging approach based on orthogonal light pathways for excitation and detection. The excitation pathway has an inverse relation between the optical sectioning strength and the e
Externí odkaz:
http://arxiv.org/abs/2407.18862
Time is, figuratively and literally, becoming the new dimension for crystalline matter. As such, rapid recent progress on time-varying media gave rise to the notion of temporal and spatiotemporal crystals. Fundamentally rethinking the role of time, w
Externí odkaz:
http://arxiv.org/abs/2407.02176
Autor:
Morales, Giorgio, Sheppard, John W.
Symbolic regression (SR) methods attempt to learn mathematical expressions that approximate the behavior of an observed system. However, when dealing with multivariate systems, they often fail to identify the functional form that explains the relatio
Externí odkaz:
http://arxiv.org/abs/2406.17834
Exposure assessment is fundamental to air pollution cohort studies. The objective is to predict air pollution exposures for study subjects at locations without data in order to optimize our ability to learn about health effects of air pollution. In a
Externí odkaz:
http://arxiv.org/abs/2406.01982
Terrain classification is an important problem for mobile robots operating in extreme environments as it can aid downstream tasks such as autonomous navigation and planning. While RGB cameras are widely used for terrain identification, vision-based m
Externí odkaz:
http://arxiv.org/abs/2404.09094