The stability of phlogopite + enstatite at high pressures; a model for micas in the interior of the Earth

1972 ◽  
Vol 272 (9) ◽  
pp. 852-869 ◽  
Author(s):  
P. J. Modreski ◽  
A. L. Boettcher
Keyword(s):  
High Pressures ◽  
The Earth ◽  
The Stability

scholarly journals The thermal conductivity of the Earth's core and implications for its thermal and compositional evolution

2020 ◽  
Author(s):  
Kenji Ohta ◽  
Kei Hirose
Keyword(s):  
Thermal Conductivity ◽  
High Pressure ◽  
Thermal History ◽  
Diamond Anvil Cell ◽  
High Pressures ◽  
Iron Alloys ◽  
Compositional Evolution ◽  
The Earth ◽  
Diamond Anvil ◽  
High Pressures And Temperatures

Abstract Precise determinations of the thermal conductivity of iron alloys at high pressures and temperatures are essential for understanding the thermal history and dynamics of the metallic cores of the Earth. We review relevant high-pressure experiments using a diamond-anvil cell and discuss implications of high core conductivity for its thermal and compositional evolution.

Some observations of the effects of high pressures and temperatures on the stability of YBa2Cu3O7−x

1990 ◽  
Vol 67 (11) ◽  
pp. 6934-6939 ◽  
Author(s):  
R. K. Williams ◽  
K. B. Alexander ◽  
J. Brynestad ◽  
T. J. Henson ◽  
D. M. Kroeger ◽  
...  
Keyword(s):  
High Pressures ◽  
High Pressures And Temperatures ◽  
The Stability

scholarly journals On the Role of the Earth-Moon System in the Stability of the Inner Solar System

1999 ◽  
Vol 117 (5) ◽  
pp. 2561-2562 ◽  
Author(s):  
F. Namouni ◽  
C. D. Murray
Keyword(s):  
Solar System ◽  
Moon System ◽  
The Earth ◽  
The Stability

scholarly journals A fibre-based 2D-slit homogenizer concept for high-precision space-based spectrometer missions

2022 ◽  
Author(s):  
Timon Hummel ◽  
Claude Coatantiec ◽  
Xavier Gnata ◽  
Tobias Lamour ◽  
Rémi Rivière ◽  
...  
Keyword(s):  
Spectral Response ◽  
Measurement Data ◽  
Single Fibre ◽  
Study Phase ◽  
Total Size ◽  
The Earth ◽  
Spectral Sample ◽  
Significant Performance ◽  
The Stability ◽  
High Level

AbstractThe measurement accuracy of recent and future space-based imaging spectrometers with a high spectral and spatial resolution suffer from the inhomogeneity of the radiances of the observed Earth scene. The Instrument Spectral Response Function (ISRF) is distorted due to the inhomogeneous illumination from scene heterogeneity. This gives rise to a pseudo-random error on the measured spectra. In order to assess the spectral stability of the spectrograph, stringent requirements are typically defined on the ISRF such as shape knowledge and the stability of the centroid position of the spectral sample. The high level of spectral accuracy is particularly crucial for missions quantifying small variations in the total column of well-mixed trace gases like $$\hbox {CO}_{2}$$ CO 2 . In the framework of the $$\hbox {CO}_{2}$$ CO 2 Monitoring Mission (CO2M) industrial feasibility study (Phase A/B1 study), we investigated a new slit design called 2D-Slit Homogenizer (2DSH). This new concept aims to reduce the Earth scene contrast entering the instrument. The 2DSH is based on optical fibre waveguides assembled in a bundle, which scramble the light in across-track (ACT) and along-track (ALT) direction. A single fibre core dimension in ALT defines the spectral extent of the slit and the dimension in ACT represents the spatial sample of the instrument. The full swath is given by the total size of the adjoined fibres in ACT direction. In this work, we provide experimental measurement data on the stability of representative rectangular core shaped fibre as well as a preliminary pre-development of a 2DSH fibre bundle. In our study, the slit concept has demonstrated significant performance gains in the stability of the ISRF for several extreme high-contrast Earth scenes, achieving a shape stability of $$<0.5{\%}$$ < 0.5 % and a centroid stability of $$<0.25 \ \text {pm}$$ < 0.25 pm (NIR). Given this unprecedented ISRF stabilization, we conclude that the 2DSH concept efficiently desensitizes the instrument for radiometric and spectral errors with respect to the heterogeneity of the Earth scene radiance.

scholarly journals Colonizing the atmosphere: a common concern without climate justice law?

2019 ◽  
Vol 26 (1) ◽  
pp. 105
Author(s):  
Susana Borràs
Keyword(s):  
Climate Change ◽  
Common Interest ◽  
Climate Justice ◽  
World Population ◽  
Environmental Costs ◽  
Common Concern ◽  
The Earth ◽  
The World ◽  
Development Processes ◽  
The Stability

<p>In the new 'Age of the Anthropocene', the Earth's atmosphere, like other elements of Nature, is rapidly being colonized by a minority of the world's population, at no cost, threatening the security of all humanity and the stability of the planet. The development processes of the great emitters of greenhouse gases have transferred social and environmental costs to all the world population, especially the most impoverished ones. This article is a critical analysis of how the legal climate change regime continues to legitimize the onslaught on the atmosphere. It reflects on the need to move to a new "climate justice law", characterized by responsibilities and obligations centered on the prevention, repair, restoration and treatment of damage and related risks linked to climate change, while protecting human rights and the atmosphere, as a common interest of humanity and the Earth.</p><p><strong>Keywords: </strong>Atmosphere, climate change, common concern of humankind, climate justice law<strong></strong></p>

scholarly journals Spatial aspect of modern warfare: from traditional warfare to cyberwar

2021 ◽  
pp. 136-149
Author(s):  
Natalia Aleksandrovna Balakleets
Keyword(s):  
Military Leaders ◽  
The Past ◽  
The Earth ◽  
Total Destruction ◽  
Spatial Aspect ◽  
Pessimistic Scenario ◽  
The Stability ◽  
Military Activity ◽  
Modern Warfare ◽  
The Military

This author substantiates the thesis on the importance of spatial factors for conducting warfare. The article traces the evolution of warfare associated with the involvement of new territories and new types of spaces in the orbit of military activity. If the warfare of the past demonstrated a direct dependence on the geographical territory and the related &ldquo;tensions&rdquo; (C. von Clausewitz), the modern warfare are emancipated from the geographical shell of the Earth. The article explicates the factors that justify the need for arranging the new warfare spaces. Special attention is given to cyberspace, its structure, and conflicts unfolding therein. The scientific novelty of consists in the interpretation of cyberspace as an expected result of the spatial evolution of warfare. The conclusion is drawn that the emergence of cyberspace contributes to solution of the problem of information vagueness and creation of the stability zones for the military leaders, but at the same is a source of problems not less dangerous for the humanity. The cyberwar winner faces a tempting challenge of establishing global control over the territory of the plane using cyberweapon, or in most pessimistic scenario, its total destruction.

scholarly journals REWETTING DESIGN FOR TROPICAL PEATLAND RESTORATION

2020 ◽  
Vol 21 (2) ◽  
pp. 111-125
Author(s):  
Ainun Hasanah ◽  
Muhammad Farouk Setiawan
Keyword(s):  
Peat Soil ◽  
Tropical Peatland ◽  
The Earth ◽  
Peatland Restoration ◽  
The World ◽  
Tropical Areas ◽  
Pvc Pipe ◽  
The Stability ◽  
Tropical Climates ◽  
Development Objectives

Peatlands located in tropical climates are estimated to have an area of ​​11% of the total peatland on earth. The scope of ​​tropical peatland is proportional to the significant role this ecosystem plays in the stability of the earth and everything in it. Various efforts have been made to restore the condition of the peatland ecosystem, especially in tropical areas that have been affected by human activities. This study using the literature review method attempts to collect and summarize various peatland restoration efforts carried out in various countries in the world, then serve as a reference and basis for consideration in redesigning peat rewetting infrastructure. The result of this study is a canal blocking design using a PVC pipe filled with peat soil in its cavity. The layout of this PVC pipe canal blocking is designed by considering various factors. Challenges and prospects related to the idea of ​​this canal blocking with PVC pipe were also taken into consideration in the design. It is hoped that the innovation of canal blocking materials can increase resource efficiency and fund for canal blocking construction while maintaining its function and development objectives. Keywords: peatland rewetting design, canal blocking, PVC pipe

Archaic aetia

2020 ◽  
pp. 40-89
Author(s):  
Anke Walter
Keyword(s):  
Complex Model ◽  
Strong Sense ◽  
New Order ◽  
Present Moment ◽  
The Earth ◽  
The World ◽  
Different Types ◽  
The Stability

The aetiological story of Ate, told by Agamemnon in Book 19 of the Iliad, establishes a connection between the crucial moment when the main conflict of the epic is resolved and an important moment of transition on Olympus. While tying the time of men and the time of gods together in a shared ‘ever since then’, the aetion also marks a growing divide between the two, providing a vivid stratigraphy of Iliadic time. In Hesiod’s Theogony, three aetia that explicitly invoke the poet’s present revolve around the central event of the work, the birth of Zeus: the origin of Hecate’s powers, Zeus’ marking the start of his reign by planting the stone that his father Cronus had swallowed instead of himself in the earth of Delphi, and Prometheus’ theft of fire. These aetia create a particularly meaningful present moment: one that testifies to the different types of divine time and its interaction with human time—including the complex model of time embodied by Hecate and the linearity of time introduced by Zeus—and implicates the audience in the stability of this new order of the world. Finally, in the Homeric Hymn to Hermes, the aetion of how the lyre becomes a token of Hermes’ and Apollo’s friendship imbues the present with a strong sense of the connection with the divine sphere, even while the lyre itself as the instrument accompanying the performance of the hymn vividly enacts its own continuity.

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