Results 71 to 80 of about 4,236,266 (343)

Os mercados, os seus saberes e as suas incertezas

open access: yesRevista Crítica de Ciências Sociais, 2002
Such as we know it, globalization does not solve the problems or address the questions of living together on the Earth. Thus, in the current context, the struggle for democracy involves three essential aspects: the reinvention of the emancipatory power ...
João Caraça
doaj   +1 more source

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

Planetary pictures: historicizing environmental and climate sciences in the Anthropocene

open access: yesBJHS Themes
How should historians of environmental and climate sciences respond to the Earth's move from the blank canvas to a foreground feature of ‘big-picture’ scholarship? This article highlights three crucial themes for histories of science in the Anthropocene:
Thomas Simpson, James Poskett
doaj   +1 more source

Preface: Interdisciplinary contributions from the Division on Energy, Resources and the Environment at the EGU General Assembly 2019 [PDF]

open access: yesAdvances in Geosciences, 2019
Since 2004, the European Geosciences Union (EGU) brings together experts from all over the world at its annual General Assembly, covering all disciplines of the earth, planetary and space sciences.
S. Martens   +7 more
doaj   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

open access: yesAdvanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan   +4 more
wiley   +1 more source

Qualified Hope and the Ethics of Planetary Boundaries

open access: yesReligions
The present essay explores the way theologies can contribute to the discussion of the ethics of the “planetary boundaries” framework and its rhetorical proposal for a ‘safe operating space’.
Forrest Clingerman
doaj   +1 more source

Global coherence, healing meditations using HeartMath applications during COVID-19 lockdown

open access: yesHTS Teologiese Studies/Theological Studies, 2020
International lockdown and social distancing as a response to COVID-19 indicate planetary interconnectedness. This South African case study compared global coherence, healing meditations using HeartMath Global Coherence and Inner Balance electronic ...
Stephen D. Edwards
doaj   +1 more source

Planetary science: Lunar conspiracies [PDF]

open access: yesNature, 2013
Current theories on the formation of the Moon owe too much to cosmic coincidences, says Robin Canup. She calls for better models and a mission to Venus.
openaire   +2 more sources

Tracing the Origins and Evolution of Small Planets using Their Orbital Obliquities [PDF]

open access: yes, 2019
We recommend an intensive effort to survey and understand the obliquity distribution of small close-in extrasolar planets over the coming decade. The orbital obliquities of exoplanets--i.e., the relative orientation between the planetary orbit and the ...
Addison, Brett C.   +8 more
core   +1 more source

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

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