Results 101 to 110 of about 121,017 (322)

From Bednets to Rocket Ships: Efficiency in the Long‐Term and Neglect for the Present

Journal of Applied Philosophy, EarlyView.
ABSTRACT In this article I develop an objection to Longtermism – the view that concern for the long‐term future is a moral imperative – that is often gestured at, but not fleshed out. I call this the Far‐Future Priority Objection: Longtermism may entail significant resource reallocation and systemic neglect of the worst off today.
Elizabeth C. Hupfer
wiley   +1 more source

Detection of Hydration on Nominally Anhydrous S-complex Main Belt Asteroids

The Planetary Science Journal
We present the results of a survey of nominally anhydrous main belt S-complex asteroids. Thirty-three observations of 29 unique asteroids were obtained using the IRTF+SpeX instrument in prism and LXD short modes.
Maggie McAdam, Cristina Thomas, Lauren McGraw, Andrew Rivkin, Joshua Emery   +4 more
doaj   +1 more source

Photometry and Models of Seven Main-Belt Asteroids

Universe
The China Near-Earth Object Survey Telescope (CNEOST) conducted four photometric surveys from 2015 to 2018 using image processing and aperture photometry techniques to obtain extensive light curve data on asteroids. The second-order Fourier series method
Jun Tian, Haibin Zhao, Bin Li, Yongxiong Zhang, Jian Chen, Leonid Elenin, Xiaoping Lu   +6 more
doaj   +1 more source

Harvesting Near Earth Asteroid Resources Using Solar Sail Technology [PDF]

, 2017
Near Earth asteroids represent a wealth of material resources to support future space ventures. These resources include water from C-type asteroids for crew logistic support; liquid propellants electrolytically cracked from water to fuel crewed vehicles ...
McInnes, Colin
core  

Augustine, AI, and the Two Models of Language

Journal of Religious Ethics, EarlyView.
ABSTRACT This article explores the two models of language articulated by Ludwig Wittgenstein and Augustine. It examines first, the central roles of language in humans and intelligent machines, and second, the implications of these models for understanding what it means to be human, as well as the promises and limits of AI systems.
Kevin Jung
wiley   +1 more source

Asteroid spin-rate studies using large sky-field surveys

Geoscience Letters, 2017
Eight campaigns to survey asteroid rotation periods have been carried out using the intermediate Palomar Transient Factory in the past 3 years. 2780 reliable rotation periods were obtained, from which we identified two new super-fast rotators (SFRs ...
Chan-Kao Chang, Hsing-Wen Lin, Wing-Huen Ip, Thomas A. Prince, Shrinivas R. Kulkarni, David Levitan, Russ Laher, Jason Surace   +7 more
doaj   +1 more source

PROPERTIES OF NEAR-SUN ASTEROIDS [PDF]

, 2013
Asteroids near the Sun can attain equilibrium temperatures sufficient to induce surface modification from thermal fracture, desiccation, and decomposition of hydrated silicates. We present optical observations of nine asteroids with perihelia
D. Jewitt
semanticscholar   +1 more source

Expelled by the Antarctic ice: Evolutionary history of the tribe Cunonieae (Cunoniaceae)

Journal of Systematics and Evolution, EarlyView.
Multiple fossil calibration points reveal recent radiations and biogeographical history of the Cunonieae tribe. The most densely sampled phylogeny allowed to infer Antarctica and Patagonia as areas of origin, confirming the reestablishment of Pterophylla and revealing the northward movement of Weinmannia into the tropical Andes. Conflicting plastid and
Francisco Fajardo‐Gutiérrez, Mariasole Calbi, Markus S. Dillenberger, Sebastian Tello, Alfredo Fuentes, Nora H. Oleas, Ricardo A. Segovia, Christine E. Edwards, Yohan Pillon, James E. Richardson, Thomas Borsch   +10 more
wiley   +1 more source

A primitive asteroid that lived fast and died young sampled by a xenolith in the Cold Bokkeveld CM2 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 464-483, March 2025.
Abstract Xenoliths in carbonaceous chondrites include lithologies that are unrepresented in the meteorite record and so are a rich source of information on asteroid diversity. Cold Bokkeveld is a CM2 regolith breccia that contains both hydrous and anhydrous lithic clasts. Here, we describe a hydrous clast with a fine‐grained rim.
Martin R. Lee, Cameron J. Floyd, Robin Haller, Sammy Griffin   +3 more
wiley   +1 more source

OBTAINING POSITIONS OF ASTEROIDS FROM DIGITIZED PROCESSING OF PHOTOGRAPHIC OBSERVATIONS IN BALDONE OBSERVATORY (CODE 069)

Odessa Astronomical Publications, 2016
Digital processing of photographic plates of star fields allows to determine with high accuracy the coordinates and stellar magnitudes for all registered objects on these plates.
I. Eglitis, M. Eglite, S. V. Shatokhina, V. M. Andruk   +3 more
doaj   +1 more source