Results 71 to 80 of about 877,284 (297)

High‐Entropy Alloy Design Toward Cobalt Substitution for High Hardness and Low Wear Rate Using X–Cr–Fe–Mn–Ni System

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the replacement of cobalt using the high‐entropy alloy design strategy for wear‐resistant components operating at high temperatures. Starting from the Cantor alloy, cobalt is substituted with Cu, Al, V, or Mo. Metallurgical and tribological analyses reveal that aluminum, vanadium, and molybdenum effectively strengthen the developed ...
Rafaël Jénot   +5 more
wiley   +1 more source

Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates [PDF]

open access: yes, 2014
We report on the orbital architectures of Kepler systems having multiple planet candidates identified in the analysis of data from the first six quarters of Kepler data and reported by Batalha et al. (2013).
Agol, Eric   +21 more
core   +4 more sources

Giant planets seismology [PDF]

open access: yesSymposium - International Astronomical Union, 1997
The giant planets Jupiter and Saturn belong to the interesting category of possible goals for remote seismic analysis. Their first seismic observations and their analysis were attempted in 1987 and 1991 respectively, under Philippe Delache's initiative.
openaire   +2 more sources

Design and Prototyping of Topology‐Optimized, Additively Manufactured Lightweight Components for Space Robotic Systems: A Case Study

open access: yesAdvanced Engineering Materials, EarlyView.
The results demonstrate a simulation‐driven workflow that applies LSB topology optimization with additive manufacturing constraints to mission‐specific load cases, integrating European Cooperation for Space Standardization compliant verification and manufacturability to develop structurally efficient rover suspension components.
Stelios K. Georgantzinos   +11 more
wiley   +1 more source

The Astrobiology of Alien Worlds: Known and Unknown Forms of Life

open access: yesUniverse, 2020
Most definitions of life assume that, at a minimum, life is a physical form of matter distinct from its environment at a lower state of entropy than its surroundings, using energy from the environment for internal maintenance and activity, and capable of
Louis N. Irwin, Dirk Schulze-Makuch
doaj   +1 more source

WARM JUPITERS FROM SECULAR PLANET–PLANET INTERACTIONS [PDF]

open access: yesThe Astrophysical Journal, 2016
ABSTRACT Most warm Jupiters (gas-giant planets with 0.1 au ≲ a ≲ 1
Cristobal Petrovich, Scott Tremaine
openaire   +2 more sources

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

open access: yesAdvanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim   +4 more
wiley   +1 more source

A new climate for human nature? Navigating social theory through postnature, the anthropocene and posthumanism [PDF]

open access: yesFilozofija i Društvo
By examining debates on the Anthropocene era ignited by new materialist and posthumanist scholarship, this paper aims to discern how these perspectives can reframe the human-nature nexus.
Janković Stefan
doaj   +1 more source

The High Eccentricity of the Planet Around 16 Cyg B

open access: yes, 1996
We consider the high eccentricity, 0.66, of the newly discovered planet around 16 Cyg B, using the fact that the parent star is part of a wide binary. We show that the high eccentricity of the planet could be the result of tidal forces exerted on 16 Cyg ...
Boss A. P.   +7 more
core   +2 more sources

Long-Period Giant Companions to Three Compact, Multiplanet Systems [PDF]

open access: yes, 2019
Understanding the relationship between long-period giant planets and multiple smaller short-period planets is critical for formulating a complete picture of planet formation. This work characterizes three such systems. We present Kepler-65, a system with
Boisvert, John H.   +9 more
core   +3 more sources

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