Special Crater Types on Vesta and Ceres as Revealed by Dawn

Mapping Intimacies ◽

10.5772/intechopen.96671 ◽

2021 ◽

Author(s):

Katrin Krohn

Keyword(s):

Impact Crater ◽

Formation Processes ◽

Distinctive Features ◽

Surface Features ◽

Dawn Mission ◽

Planetary Bodies

The exploration of two small planetary bodies by the Dawn mission revealed multifaced surfaces showing a diverse geology and surface features. Impact crater are the most distinctive features on these planetary bodies. The surfaces of asteroid Vesta and the dwarf planet Ceres reveal craters with an individual appearance as caused by different formation processes. Special topographic and subsurface conditions on both bodies have led to the development of special crater types. This chapter present the three most characteristic crater forms fund on both bodies. Asymmetric craters are found on both bodies, whereas ring-mold craters and floor-fractured craters are only visible on Ceres.

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Surface Features of Code-switching in ‘The Nigerian Online Community’ Page on Facebook

AGOGO: Journal of Humanities ◽

10.46881/ajh.v4i0.222 ◽

2021 ◽

Vol 4 ◽

pp. 26

Author(s):

Layo Olaluwoye

Keyword(s):

Online Community ◽

Language Use ◽

Code Switching ◽

Linguistic Features ◽

Functional Theory ◽

Distinctive Features ◽

Surface Features ◽

Surface Errors ◽

Code Mixing ◽

Theory Of Language

Existing studies on code-switching have mainly been carried out among English/Chinese bilinguals. Studies on English/Yoruba/Pidgin English bilinguals with emphasis on code-mixing and code-switching on the Internet have been grossly insufficient. Therefore, this study reveals the surface features of code-switching among Yoruba/English/Pidgin English bilinguals in the Nigerian Online Community on Facebook. For theoretical framework, we relied on insights from Halliday’s (1994) functional theory of language. Five types of surface features were identified: simplified lexicon and sentences, non-adherence to the use of tones/diacritics, inconsistencies of spellings and words, unnecessary lengthening of letters, and tolerance of surface errors. The study has revealed the distinctive features of code-switching in the Nigerian Online Community page on Facebook. These linguistic features have thrown more light on the characteristics of the language use on the Facebook forum and how the posters use the codes in their speech repertoire to achieve this

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Martian subsurface properties and crater formation processes inferred from fresh impact crater geometries

Meteoritics and Planetary Science ◽

10.1111/j.1945-5100.2006.tb00433.x ◽

2006 ◽

Vol 41 (10) ◽

pp. 1509-1537 ◽

Cited By ~ 65

Author(s):

Sarah T. Stewart ◽

Gregory J. Valiant

Keyword(s):

Impact Crater ◽

Formation Processes ◽

Crater Formation

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Compositional control on impact crater formation on mid-sized planetary bodies: Dawn at Ceres and Vesta, Cassini at Saturn

Icarus ◽

10.1016/j.icarus.2021.114343 ◽

2021 ◽

Vol 359 ◽

pp. 114343

Author(s):

P. Schenk ◽

J. Castillo-Rogez ◽

K.A. Otto ◽

S. Marchi ◽

D. O'Brien ◽

...

Keyword(s):

Impact Crater ◽

Crater Formation ◽

Planetary Bodies ◽

Compositional Control

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The Geosciences Applied to Lunar Exploration

Symposium - International Astronomical Union ◽

10.1017/s0074180900178222 ◽

1962 ◽

Vol 14 ◽

pp. 169-257 ◽

Cited By ~ 9

Author(s):

J. Green

Keyword(s):

Lunar Surface ◽

Probable Mechanism ◽

Point Of View ◽

Lunar Exploration ◽

Geological Model ◽

Apply Geophysics ◽

Surface Features ◽

The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

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The evolution of the Kuiper belt during the formation of the outer planets

International Astronomical Union Colloquium ◽

10.1017/s0252921100031213 ◽

1999 ◽

Vol 173 ◽

pp. 37-44

Author(s):

M.D. Melita ◽

A. Brunini

Keyword(s):

Kuiper Belt ◽

Outer Planets ◽

Self Consistent ◽

Planetary Bodies ◽

Mass Depletion

AbstractA self-consistent study of the formation of planetary bodies beyond the orbit of Saturn and the evolution of Kuiper disks is carried out by means of an N-body code where accretion and gravitational encounters are considered. This investigation is focused on the aggregation of massive bodies in the outer planetary region and on the consequences of such process in the corresponding cometary belt. We study the link between the bombardment of massive bodies and mass depletion and eccentricity excitation.

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Structural Organization and Distribution of Fiber Types in Extraocular Muscles of Cats

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100093420 ◽

1972 ◽

Vol 30 ◽

pp. 34-35

Author(s):

Asish C. Nag ◽

Lee D. Peachey

Keyword(s):

Fiber Type ◽

Light And Electron Microscopy ◽

Small Diameter ◽

Extraocular Muscles ◽

Fiber Types ◽

Distinctive Features ◽

Superior Rectus ◽

Adult Cats ◽

Different Diameters ◽

Orbital Region

Cat extraocular muscles consist of two regions: orbital, and global. The orbital region contains predominantly small diameter fibers, while the global region contains a variety of fibers of different diameters. The differences in ultrastructural features among these muscle fibers indicate that the extraocular muscles of cats contain at least five structurally distinguishable types of fibers.Superior rectus muscles were studied by light and electron microscopy, mapping the distribution of each fiber type with its distinctive features. A mixture of 4% paraformaldehyde and 4% glutaraldehyde was perfused through the carotid arteries of anesthetized adult cats and applied locally to exposed superior rectus muscles during the perfusion.

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I Like Her, Because I Like Myself: Self-Evaluation as a Source of Interpersonal Attitudes

Experimental Psychology (formerly Zeitschrift für Experimentelle Psychologie) ◽

10.1026//1618-3169.50.4.239 ◽

2003 ◽

Vol 50 (4) ◽

pp. 239-246 ◽

Cited By ~ 30

Author(s):

Eva Walther ◽

Claudia Trasselli

Keyword(s):

Opposite Effect ◽

Learning Phase ◽

The Self ◽

Attitude Formation ◽

Formation Processes ◽

False Feedback ◽

Self Evaluation ◽

Evaluation Group ◽

Group A ◽

The Difference

Abstract. Two experiments tested the hypothesis that self-evaluation can serve as a source of interpersonal attitudes. In the first study, self-evaluation was manipulated by means of false feedback. A subsequent learning phase demonstrated that the co-occurrence of the self with another individual influenced the evaluation of this previously neutral target. Whereas evaluative self-target similarity increased under conditions of negative self-evaluation, an opposite effect emerged in the positive self-evaluation group. A second study replicated these findings and showed that the difference between positive and negative self-evaluation conditions disappeared when a load manipulation was applied. The implications of self-evaluation for attitude formation processes are discussed.

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