Slow Anti-Dunes and Flow Marks

1957 ◽  
Vol 94 (6) ◽  
pp. 472-480 ◽  
Author(s):  
Archie Lamont
Keyword(s):  
Turbidity Currents ◽  
Recent Criticism ◽  
Directional Flow ◽  
Turbulent Eddies

AbstractAntidune wavecrests preserved in mud by contemporaneous currents carrying silt are discussed with reference to some recent criticism. In turbidity currents, at slow rates of directional flow, turbulent eddies may be operative in keeping sediment in suspension. Torose structures and flow marks from the Gala-Tarannon of Southern Scotland are compared with structures probably eroded by turbulent currents in the Gronigel Flysch of the Pre-Alps.

What Does the Implicit Association Test Measure? A Test of the Convergent and Discriminant Validity of Prejudice-Related IATs

2002 ◽  
Vol 49 (3) ◽  
pp. 171-180 ◽  
Author(s):  
Bertram Gawronski
Keyword(s):  
Implicit Association Test ◽  
Discriminant Validity ◽  
Association Test ◽  
Recent Criticism ◽  
Implicit Association ◽  
East Asians ◽  
Student Sample ◽  
Convergent And Discriminant Validity ◽  
Explicit Prejudice ◽  
Turkish People

Abstract. Drawing on recent criticism of the Implicit Association Test (IAT), the present study tested the convergent and discriminant validity of two prejudice-related IATs to corresponding explicit prejudice measures in a German student sample (N = 61). Confirming convergent validity, (a) an IAT designed to assess negative associations related to Turkish people was significantly related to the explicit endorsement of prejudiced beliefs about Turkish people, and (b) an IAT designed to assess negative associations related to East Asians was significantly related to explicit prejudice against East Asians. Moreover, confirming discriminant validity, (c) the Asian IAT was unrelated to the explicit endorsement of prejudiced beliefs about Turkish people, and (d) the Turkish IAT was unrelated to explicit prejudice against Asian people. These results further corroborate the assumption that the IAT is a valid method to assess the strength of evaluative associations in the domain of prejudice and stereotypes.

BED INSTABILITY GENERATED BY TURBIDITY CURRENTS

2018 ◽  
Vol 74 (4) ◽  
pp. I_1105-I_1110
Author(s):  
Sytharith PEN ◽  
Norihiro IZUMI ◽  
Sakura HAGISAWA
Keyword(s):  
Turbidity Currents

scholarly journals Reframing ‘integration’: acknowledging and addressing five core critiques

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Sarah Spencer ◽  
Katharine Charsley
Keyword(s):  
Empirical Research ◽  
Recent Criticism ◽  
Heuristic Model ◽  
Migration Studies ◽  
Methodological Nationalism ◽  
Narrow Focus ◽  
The Subject ◽  
The Rich ◽  
Definition Of

AbstractEmpirical and theoretical insights from the rich body of research on ‘integration’ in migration studies have led to increasing recognition of its complexity. Among European scholars, however, there remains no consensus on how integration should be defined nor what the processes entail. Integration has, moreover, been the subject of powerful academic critiques, some decrying any further use of the concept. In this paper we argue that it is both necessary and possible to address each of the five core critiques on which recent criticism has focused: normativity; negative objectification of migrants as ‘other’; outdated imaginary of society; methodological nationalism; and a narrow focus on migrants in the factors shaping integration processes. We provide a definition of integration, and a revised heuristic model of integration processes and the ‘effectors’ that have been shown to shape them, as a contribution to a constructive debate on the ways in which these challenges for empirical research can be overcome.

scholarly journals Design and Application of an In Situ Test Device for Rheological Characteristic Measurements of Liquefied Submarine Sediments

2021 ◽  
Vol 9 (6) ◽  
pp. 639
Author(s):  
Hong Zhang ◽  
Xiaolei Liu ◽  
Anduo Chen ◽  
Weijia Li ◽  
Yang Lu ◽  
...  
Keyword(s):  
Yellow River ◽  
Rheological Characteristic ◽  
Yellow River Delta ◽  
Turbidity Currents ◽  
Rheological Characteristics ◽  
Submarine Landslides ◽  
Test Device ◽  
Offshore Area ◽  
In Situ Test

Liquefied submarine sediments can easily lead to submarine landslides and turbidity currents, and cause serious damage to offshore engineering facilities. Understanding the rheological characteristics of liquefied sediments is critical for improving our knowledge of the prevention of submarine geo-hazards and the evolution of submarine topography. In this study, an in situ test device was developed to measure the rheological properties of liquefied sediments. The test principle is the shear column theory. The device was tested in the subaqueous Yellow River delta, and the test results indicated that liquefied sediments can be regarded as “non-Newtonian fluids with shear thinning characteristics”. Furthermore, a laboratory rheological test was conducted as a contrast experiment to qualitatively verify the accuracy of the in situ test data. Through the comparison of experiments, it was proved that the use of the in situ device in this paper is suitable and reliable for the measurement of the rheological characteristics of liquefied submarine sediments. Considering the fact that liquefaction may occur in deeper water (>5 m), a work pattern for the device in the offshore area is given. This novel device provides a new way to test the undrained shear strength of liquefied sediments in submarine engineering.

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