Error in Handling Significant Figures in Polar Coordinates in University Physics Textbooks

2021 ◽  
Vol 71 (9) ◽  
pp. 771-774
Author(s):  
Chang Uk Jung*
Keyword(s):  
Polar Coordinates ◽  
University Physics ◽  
Significant Figures

Non-Polar Variation of Latitude

1972 ◽  
Vol 1 ◽  
pp. 93-101 ◽  
Author(s):  
S. Yumi
Keyword(s):  
Polar Motion ◽  
Polar Coordinates ◽  
Normal Variation ◽  
Latitude Variation ◽  
Local Trend

ABSTRACTAnalysing the residual latitude of the station, local trend in latitude variation other than by the polar motion was found.Residual latitude was calculated for each of 26 stations which gave the continuous records of observation during 6 years comprising — 1962 — 1967 as a difference between observed variation of latitude and – normal variation calculated by the polar coordinates Iderived from all the results of 26 stations.As far as the results during these six years are concerned, local trend at any station it seemed to be expressed in terms of 3λ.Assumed effect of local trend on the coordinates values of the instantaneous pole is also discussed.

The solution problem of Dirihle for equation of Laplace in polar coordinates by method Monte Carlo

2018 ◽  
Vol 2 ◽  
pp. 114-122
Author(s):  
Yu.I. Nikolayenko ◽  
◽  
V.G. Ilvovsky ◽  
S.V. Moiseenko ◽  
◽  
...  
Keyword(s):  
Monte Carlo ◽  
Polar Coordinates ◽  
Solution Problem

Language and Meaning in the Age of Modernism

2018 ◽  
Author(s):  
James McElvenny
Keyword(s):  
Philosophy Of Language ◽  
Vienna Circle ◽  
Bertrand Russell ◽  
Historical Study ◽  
Personal Connection ◽  
International Language ◽  
Academic Philosophy ◽  
Significant Figures ◽  
Basic English ◽  
And Linguistics

This book is a historical study of influential currents in the philosophy of language and linguistics of the first half of the twentieth century, explored from the perspective of the English scholar C. K. Ogden (1889–1957). Although no ‘Great Man’ in his own right, Ogden had a personal connection, reflected in his work, to several of the most significant figures of the age. The background to the ideas espoused in Ogden’s book The Meaning of Meaning, co-authored with I.A. Richards (1893–1979), is examined in detail, along with the application of these ideas in his international language project Basic English. A richly interlaced network of connections is revealed between early analytic philosophy, semiotics and linguistics, all inevitably shaped by the contemporary cultural and political environment. In particular, significant interaction is shown between Ogden’s ideas, the varying versions of ‘logical atomism’ of Bertrand Russell (1872–1970) and Ludwig Wittgensten (1889–1951), Victoria Lady Welby’s (1837–1912) ‘significs’, and the philosophy and political activism of Otto Neurath (1882–1945) and Rudolf Carnap (1891–1970) of the Vienna Circle. Amid these interactions emerges a previously little known mutual exchange between the academic philosophy and linguistics of the period and the practically oriented efforts of the international language movement.

Quantification of excess 231Pa in late Quaternary igneous baddeleyite

2020 ◽  
Vol 105 (12) ◽  
pp. 1830-1840 ◽  
Author(s):  
Yi Sun ◽  
Axel K. Schmitt ◽  
Lucia Pappalardo ◽  
Massimo Russo
Keyword(s):  
Late Quaternary ◽  
Central Italy ◽  
Direct Analysis ◽  
Weight Percent ◽  
Volcanic Field ◽  
Distribution Coefficients ◽  
Secular Equilibrium ◽  
Melt Distribution ◽  
D Values ◽  
Significant Figures

Abstract Initial excess protactinium (231Pa) is a frequently suspected source of discordance in baddeleyite (ZrO2) geochronology, which limits accurate U/Pb dating, but such excesses have never been directly demonstrated. In this study, Pa incorporation in late Holocene baddeleyite from Somma-Vesuvius (Campanian Volcanic Province, central Italy) and Laacher See (East Eifel Volcanic Field, western Germany) was quantified by U-Th-Pa measurements using a large-geometry ion microprobe. Baddeleyite crystals isolated from subvolcanic syenites have average U concentrations of ~200 ppm and are largely stoichiometric with minor abundances of Nb, Hf, Ti, and Fe up to a few weight percent. Measured (231Pa)/(235U) activity ratios are significantly above the secular equilibrium value of unity and range from 3.4(8) to 14.9(2.6) in Vesuvius baddeleyite and from 3.6(9) to 8.9(1.4) in Laacher See baddeleyite (values within parentheses represent uncertainties in the last significant figures reported as 1σ throughout the text). Crystallization ages of 5.12(56) ka (Vesuvius; MSWD = 0.96, n = 12) and 15.6(2.0) ka (Laacher See; MSWD = 0.91, n = 10) were obtained from (230Th)/(238U) disequilibria for the same crystals, which are close to the respective eruption ages. Applying a corresponding age correction indicates average initial (231Pa)/(235U)0 of 8.8(1.0) (Vesuvius) and 7.9(5) (Laacher See). For reasonable melt activities, model baddeleyite-melt distribution coefficients of DPa/DU = 5.8(2) and 4.1(2) are obtained for Vesuvius and Laacher See, respectively. Speciation-dependent (Pa4+ vs. Pa5+) partitioning coefficients (D values) from crystal lattice strain models for tetra- and pentavalent proxy ions significantly exceed DPa/DU inferred from direct analysis of 231Pa for Pa5+. This is consistent with predominantly reduced Pa4+ in the melt, for which D values similar to U4+ are expected. Contrary to common assumptions, baddeleyite-crystallizing melts from Vesuvius and Laacher See appear to be dominated by Pa4+ rather than Pa5+. An initial disequilibrium correction for baddeleyite geochronology using DPa/DU = 5 ± 1 is recommended for oxidized phonolitic melt compositions.

Foucault, Lenin, and Western Marxism

2019 ◽  
Vol 29 (2) ◽  
pp. 251-267
Keyword(s):  
Public Intellectual ◽  
Philosophical Tradition ◽  
Real Problem ◽  
Social Changes ◽  
Revolutionary Movement ◽  
History Of ◽  
The 1960S ◽  
Significant Figures ◽  
Marxist Tradition ◽  
Western Marxism

This article others a brief historical account of the complex relationship between Michel Foucault and certain theorists in the Western Marxist philosophical tradition. In the context of the history of the “short twentieth century,” Western Marxism is an intellectual trend based on an interpretation of non-Western revolutionary praxis (by Bolsheviks, Maoists, Guevaristas, etc.). Comparative analysis of several schematic portraits - of Lenin’s revolutionary intellectual, of traditional as opposed to organic intellectuals in Gramsci, and of Foucault’s public intellectual - shows that Foucault in a certain instances was not an external enemy of the Western Marxist tradition, but rather its internal critic. Foucault comes across as a revisionist who engaged in a debate with Lenin about the strategy of the revolutionary movement in France of the 1960s and the 70s. Foucault’s criticism of Leninism unexpectedly turns out to be consistent with the basic struggle of post-WWII Western Marxism to find an alternative to the Bolshevik experience of revolution. This deliberate concurrence makes Foucault one of the significant figures in the history of late Western Marxism, but this becomes a real problem for current historians of neo-Marxist thought when coupled with his generally anti-Marxist views. The article discusses two possible solutions to this problem devised by Perry Anderson and Daniel Bensaid. Anderson’s description of the role of Foucault in the fate of Western Marxism is limited to conceptual questions about the relationship between Marxism and (post) structuralism. Bensaid tries to explain how Foucault fits into the Marxist tradition by appealing to social changes, specifically the changing ideology of capitalist society (in the spirit of The New Spirit of Capitalism by Luc Boltanski and Ève Chiapello). Building on Bensaid’s work, the article shows the link between Foucault’s position on public intellectuals and the crisis of the revolutionary movement of the last half-century, in particular by reference to the famous “Iranian episode” in Foucault’s biography.

Classics and Irish Politics, 1916-2016

2020 ◽  
Keyword(s):  
Material Culture ◽  
Cultural History ◽  
Political Discourse ◽  
Postcolonial Studies ◽  
Classical Literature ◽  
Northern Irish ◽  
Classical Culture ◽  
Significant Figures ◽  
Historical Past ◽  
Irish Politics

This collection addresses how models from ancient Greece and Rome have permeated Irish political discourse in the century since 1916. The 1916 Easter Rising, when Irish nationalists rose up against British imperial forces, was almost instantly mythologized in Irish political memory as a turning point in the nation’s history and an event that paved the way for Irish independence. Its centenary has provided a natural point for reflection on Irish politics, and this volume highlights an unexplored element in Irish political discourse, namely its frequent reference to, reliance on, and tensions with classical Greek and Roman models. Topics covered include the reception and rejection of classical culture in Ireland; the politics of Irish language engagement with Greek and Roman models; the intersection of Irish literature with scholarship in Classics and Celtic Studies; the use of classical allusion to articulate political inequalities across hierarchies of gender, sexuality, and class; meditations on the Northern Irish conflict through classical literature; and the political implications of neoclassical material culture in Irish society. As the only country colonized by Britain with a pre-existing indigenous heritage of expertise in classical languages and literature, Ireland represents a unique case in the fields of classical reception and postcolonial studies. This book opens a window on a rich and varied dialogue between significant figures in Irish cultural history and the Greek and Roman sources that have inspired them, a dialogue that is firmly rooted in Ireland’s historical past and continues to be ever-evolving.

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