Results 71 to 80 of about 61,814 (221)

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Interactions of ultrahigh-energy cosmic rays with photons in the galactic center

, 2005
Ultrahigh-energy cosmic rays passing through the central region of the Galaxy interact with starlight and the infrared photons. Both nuclei and protons generate secondary fluxes of photons and neutrinos on their passage through the central region.
Abbasi, Alexander Kusenko, Armstrong, Bahcall, Benakli, Berezinsky, Berezinsky, Bird, Birkel, Coleman, Engel, Epele, Figer, Floyd W. Stecker, Frogel, Gelmini, Gerasimova, Greisen, Güsten, Hüttemeister, Jason Schissel, Kuzmin, Kuzmin, Kuzmin, Lawrence, Mauersberger, Medina-Tanco, Moore, Morris, Morris, Navarro, Stecker, Stecker, Stecker, Stecker, Stecker, Takeda, Zatsepin, Zatsepin   +38 more
core   +2 more sources

Strategies for Assessing Post‐Wildfire Geomorphic Resilience in Semiarid Rivers

River Research and Applications, EarlyView.
ABSTRACT We review and summarize diverse components of a catchment that can be monitored after wildfire to assess the geomorphic resilience of the river corridor in semiarid regions. We distinguish upland portions of river catchments from river corridors.
Ellen Wohl, Shayla Triantafillou, Alex Thornton‐Dunwoody, Connor Mertz, Katie Larkin, William Keenan, Steven Griffin, Dylan Davis, Lindsey Blehm   +8 more
wiley   +1 more source

Measurements of Proton, Helium and Muon Spectra at Small Atmospheric Depths with the BESS Spectrometer

, 2003
The cosmic-ray proton, helium, and muon spectra at small atmospheric depths of 4.5 -- 28 g/cm^2 were precisely measured during the slow descending period of the BESS-2001 balloon flight.
A Yamamoto, A.A Moiseev, Aguilar, Ajima, Asaoka, Asaoka, Brekke, E.S Seo, Engelmann, Feldman, Fukuda, H Fuke, H Matsumoto, Honda, J Nishimura, J Suzuki, J.F Ormes, J.W Mitchell, K Abe, K Anraku, K Izumi, K Tanaka, K Tanizaki, K Yamato, K Yoshimura, M Imori, M Nozaki, M Sasaki, Motoki, N Ikeda, N Matsui, Orito, R.E Streitmatter, Roeseler, S Haino, S Matsuda, S Orito, Sanuki, Sanuki, Seo, Shikaze, Stephens, Sullivan, T Maeno, T Matsukawa, T Sanuki, T Sonoda, T Yamagami, T Yoshida, Y Asaoka, Y Makida, Y Shikaze, Y Yamamoto, Yamamoto   +53 more
core   +2 more sources

Embodied, Enacted, and Multimodal: Exploring Science Teachers’ Metaphors in Authentic Classroom Contexts

Science Education, EarlyView.
ABSTRACT Over the past decades, science education research has extensively examined the role of metaphors in teaching and learning science. However, much of the existing research has focused on verbal manifestations of metaphors, thereby overlooking aspects of metaphors that may occur in non‐verbal form. This study reconceptualises metaphors as dynamic
Magdalena Kersting, Priscila Kohler, Marianne Ødegaard   +2 more
wiley   +1 more source

Solar Cyclic Modulation of Diurnal Variation in Cosmic Ray Intensity

Journal of Astronomy and Space Sciences, 2018
Cosmic rays are ions that move at relativistic speeds. They generate secondary cosmic rays by successive collisions with atmospheric particles, and then, the secondary particles reach the ground.
Eun Ho Park, Jongil Jung, Suyeon Oh, Paul Evenson   +3 more
doaj   +1 more source

Cosmic-ray knee and flux of secondaries from interactions of cosmic rays with dark matter

, 2009
We discuss possible implications of a large interaction cross section between cosmic rays and dark matter particles due to new physics at the TeV scale. In particular, in models with extra dimensions and a low fundamental scale of gravity the cross section grows very fast at transplanckian energies.
Masip, Manuel, Mastromatteo, Iacopo
openaire   +2 more sources

Neutrino flavor ratios modified by cosmic-ray secondary acceleration [PDF]

Physical Review D, 2015
Acceleration of $π$'s and $μ$'s modifies the flavor ratio at Earth (at astrophysical sources) of neutrinos produced by $π$ decay, $ν_e:ν_μ:ν_τ$, from $1:1:1$ ($1:2:0$) to $1:1.8:1.8$ ($0:1:0$) at high energy, because $π$'s decay more than $μ$'s during secondary-acceleration.
Kawanaka, Norita, Ioka, Kunihito
openaire   +2 more sources

Luminescence dating of coastal deposits from the Chanthaburi Plain, Thailand

Boreas, EarlyView.
The ongoing global sea‐level rise urges us to better understand the dynamics of coastal processes for predicting future changes. Sedimentary deposits reflect past coastal environments but require precise chronological data to place evidence into a temporal context.
Margarita Nuss, Sakonvan Chawchai, Savanna Kager, Smith Leknettip, Yunyi Li, Kannika Wangritthikraikul, Frank Preusser   +6 more
wiley   +1 more source

Evolution of the Secondary Electron Spectrum during Cosmic-Ray Discharge in the Universe

The Astrophysical Journal
We recently found that streaming cosmic rays (CRs) induce a resistive electric field that can accelerate secondary electrons produced by CR ionization.
Yutaka Ohira
doaj   +1 more source