Results 51 to 60 of about 36,668 (189)

Extraterrestrial rock mechanics and brittleness indices of simulated Martian rocks with implications for in-situ resource utilization on Mars

International Journal of Mining Science and Technology
Brittleness Index (BI), while not universally standardized, is one of the most critical parameters in the assessment of rock failure behavior, drillability, and excavation efficiency in mining; however, its applicability to extraterrestrial environments ...
Carol Mgiba, Oladoyin Kolawole
doaj   +1 more source

On Our Cosmic (In)significance

Ratio, EarlyView.
ABSTRACT This article discusses three interpretations of cosmic significance, all of which reveal something important about the notion of significance. Along the way, it proposes a unified view of significance by combining elements of each of the views.
Oskari Sivula
wiley   +1 more source

Effect of the Net Charges Carried by Dust on Martian Atmospheric Temperature

Geophysical Research Letters, 2023
Dust particles suspended in the dusty Martian atmosphere are prone to being charged. In this paper, we investigate the effect of the net charges carried by dust particles on the radiative properties of Martian dust.
Xuebang Gao, Li Xie, Jùn Zhou
doaj   +1 more source

Perennially ice‐covered lake facies as proxies for ice cover properties and climate: Insights from Lake Joyce, Antarctica

Sedimentology, EarlyView.
ABSTRACT Process‐based depositional models for perennially ice‐covered lakes (PICLs) are important for interpreting palaeolake deposits and their connection to past climate. PICLs are only stable under specific climate states, and unlike other ice‐free or seasonally ice‐covered lakes, PICL deposits generally have bimodal grain sizes: mud introduced by ...
Frances Rivera‐Hernández, Dawn Y. Sumner, Tyler J. Mackey   +2 more
wiley   +1 more source

Social Aspects Regarding the Single-Parent Families Vulnerability - The Case Of Arad County

Academicus International Scientific Journal, 2016
Based on empiric investigations and the study of documents from specialized public institutions, the authors analyse in this article the extent, manifestations, causes and consequences of single-parent families in Arad County.
Marţian Iovan, Maria Oprea
doaj   +1 more source

Immunological detection of small organic molecules in the presence of perchlorates: relevance to the life marker chip and life detection on Mars. [PDF]

, 2011
The proposed ExoMars mission, due to launch in 2018, aims to look for evidence of extant and extinct life in martian rocks and regolith. Previous attempts to detect organic molecules of biological or abiotic origin on Mars have been unsuccessful ...
David C. Cullen, Sims, Mark R., Cullen, David C., Rix, Catherine S., Catherine S. Rix, Mark R. Sims   +5 more
core   +1 more source

Constraints on Martian Chronology from Meteorites

Geosciences, 2020
Martian meteorites provide the only direct constraints on the timing of Martian accretion, core formation, magmatic differentiation, and ongoing volcanism. While many radiogenic isotope chronometers have been applied to a wide variety of Martian samples,
Zoltán Váci, Carl Agee
doaj   +1 more source

Martian Bow Shock Oscillations Driven by Solar Wind Variations: Simultaneous Observations From Tianwen‐1 and MAVEN

Geophysical Research Letters, 2023
The Martian bow shock stands as the first defense against the solar wind and shapes the Martian magnetosphere. Previous studies showed the correlation between the Martian bow shock location and solar wind parameters.
Long Cheng, Robert Lillis, Yuming Wang, Anna Mittelholz, Shaosui Xu, David L. Mitchell, Catherine Johnson, Zhenpeng Su, Jasper S. Halekas, Benoit Langlais, Tielong Zhang, Guoqiang Wang, Sudong Xiao, Zhuxuan Zou, Zhiyong Wu, Yutian Chi, Zonghao Pan, Kai Liu, Xinjun Hao, Yiren Li, Manming Chen, Jared Espley, Frank Eparvier, Shannon Curry   +23 more
doaj   +1 more source

Effects of Ambient Moisture and Large‐Strain Dynamic Preloading on the Dynamic Properties of the EAC‐1A Regolith Simulant

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 16, Page 5701-5711, November 2026.
ABSTRACT The EAC‐1A lunar mare simulant, a silty sand, was selected by the European Astronaut Center (EAC) for use in the LUNA analogue facility's lunar simulation testbed. Its stress‐ and strain‐dependent shear modulus and damping ratio were determined via resonant column testing on specimens prepared either from ambient moisture material or oven ...
Christos Vrettos
wiley   +1 more source

I. Variability of the Outgoing Thermal IR Spectra and Its Application in GCM Validation. II. The Detection of Cloud/Aerosol in the Outgoing Thermal IR Spectra [PDF]

, 2004
The theme of this thesis is studying the outgoing thermal IR spectra of Earth and Mars. It is divided into two parts: the first part (Chapters 1-4) is focused on the variability seen in the outgoing thermal IR spectra and its application in validating ...
Huang, Xianglei
core   +1 more source