THE STATE OF THE ART AND THE FATE OF THE EARTH

The development of the Earth’s and planets formation theory over 70 years is considered with a special focus on the history of development of this theory at the Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences (IPE RAS) where this direction of research was founded by Otto Schmidt. The state of the art of the theory is outlined. In particular, the planetesimals formation problem currently belonging to the key unsolved issues in the theory of planet formation is discussed. Recent results of the studies aimed at solving this problem at IPE RAS are presented.

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Long-term Earth Orientation Monitoring Using Various Techniques

International Astronomical Union Colloquium ◽

10.1017/s0252921100061467 ◽

2000 ◽

Vol 178 ◽

pp. 337-344

Author(s):

D. Gambis

Keyword(s):

Polar Motion ◽

State Of The Art ◽

The State ◽

Central Bureau ◽

Earth Orientation ◽

The Earth ◽

Individual Contributions ◽

Composite Series

AbstractA continuous composite series of polar motion components extending from 1846 until now called EOP (IERS) C01 is available at the Earth Orientation Section of the Central Bureau of the IERS. This series is the basis of the IERS system. It relies on different series derived from optical astrometry until 1972 and geodetic techniques since. It is given at 0.1 year intervals (1846–1889) and 0.05 year intervals (1890-now). Its accuracy has dramatically improved from 100 mas in 1846 to about 0.2 mas at present.Now the IERS combined solutions involve mainly the contributions of VLBI, GPS and SLR techniques. It is regularly recomputed to take advantage of the improvement of the various recent individual contributions and of the refinement of the analyses procedures.The objective of this paper is to describe this long-term polar motion series and to present the evolution and the state of the art of the multi-technique EOP combined solutions and the predictions regularly computed at the IERS/CB.

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Geospace perturbations induced by the Earth: The state of the art and future trends

Physics and Chemistry of the Earth Parts A/B/C ◽

10.1016/j.pce.2015.05.004 ◽

2015 ◽

Vol 85-86 ◽

pp. 17-33 ◽

Cited By ~ 28

Author(s):

A. De Santis ◽

G. De Franceschi ◽

L. Spogli ◽

L. Perrone ◽

L. Alfonsi ◽

...

Keyword(s):

State Of The Art ◽

The State ◽

Future Trends ◽

The Earth

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Testing Gravitational Theories in the Field of the Earth with the SaToR-G Experiment

Universe ◽

10.3390/universe7060192 ◽

2021 ◽

Vol 7 (6) ◽

pp. 192

Author(s):

David Lucchesi ◽

Luciano Anselmo ◽

Massimo Bassan ◽

Marco Lucente ◽

Carmelo Magnafico ◽

...

Keyword(s):

General Relativity ◽

State Of The Art ◽

Current Knowledge ◽

Slow Motion ◽

Weak Field ◽

New Physics ◽

The State ◽

The Earth ◽

Gravitational Theories ◽

Theories Of Gravitation

A new satellite-based experiment in the field of gravitation, SaToR-G, is presented. It aims to compare the predictions of different theories of gravitation in the limit of weak-field and slow-motion. The ultimate goal of SaToR-G is searching for possible “new physics” beyond General Relativity, which represent the state-of-the-art of our current knowledge of gravitational physics. A key role in the above perspective is the theoretical and experimental framework that confines our work. To this end, we will exploit as much as possible the classical framework suggested by R.H. Dicke over fifty years ago.

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Practical Picture Processing

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100051700 ◽

1974 ◽

Vol 32 ◽

pp. 338-339

Author(s):

T. A. Welton

Keyword(s):

Radiation Damage ◽

Coherence Length ◽

Spatial Information ◽

State Of The Art ◽

Coherent Radiation ◽

The State ◽

Energy Spread ◽

Electron Micrograph ◽

Picture Processing ◽

Molecular Skeleton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.

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