Results 91 to 100 of about 23,038 (167)

Dynamic characteristics of a two-stage variable-mass flexible missile with internal flow [PDF]

open access: yes
A general formulation of the dynamical problems associated with powered flight of a two stage flexible, variable-mass missile with internal flow, discrete masses, and aerodynamic forces is presented.
Bankovskis, J., Meirovitch, L.
core   +1 more source

An Overview of the Rock Art of AlUla: Tracing Changes in Content and Form Across 12,000 Years of Human History

open access: yesArabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Between 2018 and 2021, the Identification and Documentation of Immovable Heritage Assets (IDIHA) Project recorded over 19,000 rock art panels in the AlUla (al‐‘Ulā) region of north‐western Saudi Arabia. This study presents a chronological assessment of the corpus, drawing on superimpositions, datable motifs, inscriptions, and varnish formation,
Maria Guagnin   +3 more
wiley   +1 more source

New Results From the Pre‐Pottery Neolithic Site of Al Uyaynah, Tabuk, in Northwestern Saudi Arabia

open access: yesArabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Al Uyaynah is a low sandstone mound on an alluvial plain, long known for its extensive surface remains of stone‐built circular and rectangular structures. Following test excavations in 2012, more detailed excavation was undertaken in 2016 within one of the largest rectangular stone structures.
Khalid Alasmari   +6 more
wiley   +1 more source

Iron Ore Pricing in China: Financialization Through a Marxist Lens

open access: yesAbacus, EarlyView.
We offer a Marxist interpretation of financialization as we examine the Chinese market for iron ore and the shift in the pricing mechanism from an annual fixed price to an indexed price from 2010. Drawing upon Marx's theory of the circuit of capital, we illustrate an empirical case of financialization that results from the conflict between social ...
Xun Gong, Eagle Zhang, Corinne Cortese
wiley   +1 more source

Solar-Terrestrial Science Strategy Workshop [PDF]

open access: yes
The conclusions and recommendations reached at the Solar Terrestrial Science Strategy Workshop are summarized. The charter given to this diverse group was: (1) to establish the level of scientific understanding to be accomplished with the completion of ...
Banks, Peter M.   +2 more
core   +1 more source

Spectacle and Spy Stories: The 1954 Royal Commission on Espionage

open access: yesAustralian Journal of Politics &History, EarlyView.
ABSTRACT The Menzies government's 1954 royal commission, established to investigate Soviet espionage in Australia, is well known as the backdrop to the Labor Party split. It saw opposition leader H.V. Evatt's demise and ushered in an almost 20‐year period of Liberal Party governance.
Ebony Nilsson
wiley   +1 more source

Spacecraft and mission design for the SP-100 flight experiment [PDF]

open access: yes
The design and performance of a spacecraft employing arcjet nuclear electric propulsion, suitable for use in the SP-100 Space Reactor Power System (SRPS) Flight Experiment, are outlined.
Deininger, William D., Vondra, Robert J.
core   +1 more source

Police department design, political pressure, and racial inequality in arrests

open access: yesAmerican Journal of Political Science, EarlyView.
Abstract This paper theorizes a source of bias in discretionary arrests: strategic limits on police officer learning. Officers have a variety of tactics at their disposal besides arrest that they use for less serious offenses when they judge the underlying behavior to be less severe. In departments led by a chief with special expertise in crime control,
Andrew J. McCall
wiley   +1 more source

Operation of an electron-bombardment ion source using various gases [PDF]

open access: yes
An electron-bombardment ion thruster of the SERT 2 type was operated with xenon, krypton, argon, neon, nitrogen, helium, and carbon dioxide. The discharge performance with xenon, krypton, and argon was similar to that obtained previously with mercury ...
Byers, D. C., Reader, P. D.
core   +1 more source

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