scholarly journals Thickness and structure of the martian crust from InSight seismic data

Science ◽  
2021 ◽  
Vol 373 (6553) ◽  
pp. 438-443 ◽  
Author(s):  
Brigitte Knapmeyer-Endrun ◽  
Mark P. Panning ◽  
Felix Bissig ◽  
Rakshit Joshi ◽  
Amir Khan ◽  
...  
Keyword(s):  
Seismic Data ◽  
Bulk Composition ◽  
Landing Site ◽  
Absolute Measurement ◽  
Average Thickness ◽  
Planetary Formation ◽  
Point Measurement ◽  
The Third ◽  
History Of ◽  
Formation And Evolution

A planet’s crust bears witness to the history of planetary formation and evolution, but for Mars, no absolute measurement of crustal thickness has been available. Here, we determine the structure of the crust beneath the InSight landing site on Mars using both marsquake recordings and the ambient wavefield. By analyzing seismic phases that are reflected and converted at subsurface interfaces, we find that the observations are consistent with models with at least two and possibly three interfaces. If the second interface is the boundary of the crust, the thickness is 20 ± 5 kilometers, whereas if the third interface is the boundary, the thickness is 39 ± 8 kilometers. Global maps of gravity and topography allow extrapolation of this point measurement to the whole planet, showing that the average thickness of the martian crust lies between 24 and 72 kilometers. Independent bulk composition and geodynamic constraints show that the thicker model is consistent with the abundances of crustal heat-producing elements observed for the shallow surface, whereas the thinner model requires greater concentration at depth.

A Universe of Societies

2018 ◽  
Author(s):  
Didier Debaise
Keyword(s):  
Spatial Relations ◽  
The Third ◽  
The Status ◽  
History Of ◽  
Temporal And Spatial

Which kind of relation exists between a stone, a cloud, a dog, and a human? Is nature made of distinct domains and layers or does it form a vast unity from which all beings emerge? Refusing at once a reductionist, physicalist approach as well as a vitalistic one, Whitehead affirms that « everything is a society » This chapter consequently questions the status of different domains which together compose nature by employing the concept of society. The first part traces the history of this notion notably with reference to the two thinkers fundamental to Whitehead: Leibniz and Locke; the second part defines the temporal and spatial relations of societies; and the third explores the differences between physical, biological, and psychical forms of existence as well as their respective ways of relating to environments. The chapter thus tackles the status of nature and its domains.

The Origins of Gritty Realism on British Television: Euston Films and Special Branch

2014 ◽  
Vol 11 (1) ◽  
pp. 23-40 ◽  
Author(s):  
Max Sexton
Keyword(s):  
Cultural Discourse ◽  
Technological Changes ◽  
Television Drama ◽  
The Third ◽  
Fourth Series ◽  
History Of

Euston Films was the first film subsidiary of a British television company that sought to film entirely on location. To understand how the ‘televisual imagination’ changed and developed in relationship to the parent institution's (Thames Television) economic and strategic needs after the transatlantic success of its predecessor, ABC Television, it is necessary to consider how the use of film in television drama was regarded by those working at Euston Films. The sources of realism and development of generic verisimilitude found in the British adventure series of the early 1970s were not confined to television, and these very diverse sources both outside and inside television are well worth exploring. Thames Television, which was formed in 1968, did not adopt the slickly produced adventure series style of ABC's The Avengers, for example. Instead, Thames emphasised its other ABC inheritance – naturalistic drama in the form of the studio-based Armchair Theatre – and was to give the adventure series a strong London lowlife flavour. Its film subsidiary, Euston Films, would produce ‘gritty’ programmes such as the third and fourth series of Special Branch. Amid the continuities and tensions between ABC and Thames, it is possible to discern how economic and technological changes were used as a cultural discourse of value that marks the production of Special Branch as a key transformative moment in the history of British television.

Displace of Documentary Heritage from the Soviet Union to Poland during the Third Decade of the XXth Century

2014 ◽  
Vol 3 ◽  
pp. 127-137
Author(s):  
Tatsiana Hiarnovich
Keyword(s):  
Soviet Union ◽  
International Agreements ◽  
Peace Treaty ◽  
Actual Process ◽  
Xxth Century ◽  
The Third ◽  
The Soviet Union ◽  
History Of ◽  
Selection Of

The paper explores the displace of Polish archives from the Soviet Union that was performed in 1920s according to the Riga Peace Treaty of 1921 and other international agreements. The aim of the research is to reconstruct the process of displace, based on the archival sources and literature. The object of the research is those documents that were preserved in the archives of Belarus and together with archives from other republics were displaced to Poland. The exploration leads to clarification of the selection of document fonds to be displaced, the actual process of movement and the explanation of the role that the archivists of Belarus performed in the history of cultural relationships between Poland and the Soviet Union. The articles of the Treaty of Riga had been formulated without taking into account the indivisibility of archive fonds that is one of the most important principles of restitution, which caused the failure of the treaty by the Soviet part.

The Question of Authority: Deracinating Race, Repositioning Religion, and Regenerating Gender in the History of African American Islam

2010 ◽  
Vol 4 (1-2) ◽  
pp. 213-227
Author(s):  
Rosemary Hicks
Keyword(s):  
African American ◽  
Review Essay ◽  
Oxford University ◽  
The Third ◽  
History Of ◽  
American Islam ◽  
African American Islam ◽  
Oxford University Press

A review essay devoted to Islam and the Blackamerican: Looking Toward the Third Resurrection by Sherman A. Jackson. Oxford University Press, 2005. 256 pages. Hb. $29.95/£22.50, ISBN-13: 9780195180817.

A Short Modern History of Studying Sacrobosco’s De sphaera

2020 ◽  
Vol 65 (Special Issue) ◽  
pp. 23-33
Author(s):  
Alin Constantin Corfu
Keyword(s):  
20Th Century ◽  
Modern History ◽  
13Th Century ◽  
The Third ◽  
History Of ◽  
University Of Paris ◽  
The University

"A Short Modern History of Studying Sacrobosco’s De sphaera. The treatise generally known as De sphaera offered at the beginning of the 13th century a general image of the structure of the cosmos. In this paper I’m first trying to present a triple stake with which this treaty of Johannes de Sacrobosco (c. 1195 - c. 1256). This effort is intended to draw a context upon the treaty on which I will present in the second part of this paper namely, a short modern history of studying this treaty starting from the beginning of the 20th century up to this day. The first stake consists in the well-known episode of translation of the XI-XII centuries in the Latin milieu of the Greek and Arabic treaties. The treatise De sphaera taking over, assimilating and comparing some of the new translations of the texts dedicated to astronomy. The second Consists in the fact that Sacrobosco`s work can be considered a response to a need of renewal of the curriculum dedicated to astronomy at the University of Paris. And the third consists in the novelty and the need to use the De sphaera treatise in the Parisian University’s curriculum of the 13th century. Keywords: astronomy, translation, university, 13th Century, Sacrobosco, Paris, curriculum"

Users behaviors: The Heritage of Digital World

2014 ◽  
Vol 13 (7) ◽  
pp. 4675-4682
Author(s):  
Atefeh Danesh Moghadam ◽  
Alireza Alagha
Keyword(s):  
Technology Development ◽  
Second Step ◽  
Information Communication ◽  
The Third ◽  
Digital World ◽  
New Concepts ◽  
Emerging Patterns ◽  
History Of ◽  
Fourth Step ◽  
Communication And Technology

In the advent of information era, not only digital world is going to expand its territories, it is going to penetrate into the traditional notions about the meaning of the words and also valorize new concepts. According to Oxford Dictionary, the word heritage is defined: The history, tradition and qualities that a country or society has had for many years and that are considered an important part of its character. In order to present how emerging patterns, as the consequences of technology development, are going to be considered as the new concept of heritage, we follow four steps. In the first step, we present the convergence of Information, Communication and Technology (ICT) and a concise history of its convergence. In the second step, we argue how convergence has culminated in emerging patterns and also has made changes in digital world. In the third step, the importance of users behaviors and its mining is surveyed. Finally, in the fourth step; we illustrate User Generated Contents (UGC) as the most prominent users behaviors in digital world.

Same Address, Different Doors: Post-Heritage Deconstruction of the Heritage Household in Upstairs Downstairs in the 1970s and 2010s

2020 ◽  
Author(s):  
William Abbiss
Keyword(s):  
Final Section ◽  
Social Structures ◽  
The Third ◽  
The Past ◽  
War Narrative ◽  
Critical History ◽  
The Social ◽  
Fourth Series ◽  
History Of ◽  
Multiple Episodes

This article offers a ‘post-heritage’ reading of both iterations of Upstairs Downstairs: the LondonWeekend Television (LWT) series (1971–5) and its shortlived BBC revival (2010–12). Identifying elements of subversion and subjectivity allows scholarship on the LWT series to be reassessed, recognising occasions where it challenges rather than supports the social structures of the depicted Edwardian past. The BBC series also incorporates the post-heritage element of self-consciousness, acknowledging the parallel between its narrative and the production’s attempts to recreate the success of its 1970s predecessor. The article’s first section assesses the critical history of the LWT series, identifying areas that are open to further study or revised readings. The second section analyses the serialised war narrative of the fourth series of LWT’s Upstairs, Downstairs (1974), revealing its exploration of female identity across multiple episodes and challenging the notion that the series became more male and upstairs dominated as it progressed. The third section considers the BBC series’ revised concept, identifying the shifts in its main characters’ positions in society that allow the series’ narrative to question the past it evokes. This will be briefly contrasted with the heritage stability of Downton Abbey (ITV, 2010–15). The final section considers the household of 165 Eaton Place’s function as a studio space, which the BBC series self-consciously adopts in order to evoke the aesthetics of prior period dramas. The article concludes by suggesting that the barriers to recreating the past established in the BBC series’ narrative also contributed to its failure to match the success of its earlier iteration.

Same Address, Different Doors: Post-Heritage Deconstruction of the Heritage Household in Upstairs Downstairs in the 1970s and 2010s

2020 ◽  
Author(s):  
William Abbiss
Keyword(s):  
Final Section ◽  
Social Structures ◽  
The Third ◽  
The Past ◽  
War Narrative ◽  
Critical History ◽  
The Social ◽  
Fourth Series ◽  
History Of ◽  
Multiple Episodes

This article offers a ‘post-heritage’ reading of both iterations of Upstairs Downstairs: the LondonWeekend Television (LWT) series (1971–5) and its shortlived BBC revival (2010–12). Identifying elements of subversion and subjectivity allows scholarship on the LWT series to be reassessed, recognising occasions where it challenges rather than supports the social structures of the depicted Edwardian past. The BBC series also incorporates the post-heritage element of self-consciousness, acknowledging the parallel between its narrative and the production’s attempts to recreate the success of its 1970s predecessor. The article’s first section assesses the critical history of the LWT series, identifying areas that are open to further study or revised readings. The second section analyses the serialised war narrative of the fourth series of LWT’s Upstairs, Downstairs (1974), revealing its exploration of female identity across multiple episodes and challenging the notion that the series became more male and upstairs dominated as it progressed. The third section considers the BBC series’ revised concept, identifying the shifts in its main characters’ positions in society that allow the series’ narrative to question the past it evokes. This will be briefly contrasted with the heritage stability of Downton Abbey (ITV, 2010–15). The final section considers the household of 165 Eaton Place’s function as a studio space, which the BBC series self-consciously adopts in order to evoke the aesthetics of prior period dramas. The article concludes by suggesting that the barriers to recreating the past established in the BBC series’ narrative also contributed to its failure to match the success of its earlier iteration.

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