13,397 research outputs found
Redmond (2002) Revisited: Have Standardized Behavioral Rating Scales Gotten Better at Accommodating for Overlapping Symptoms with Language Impairment?
No full textSeventeen years ago, Redmond 1 reviewed five standardized behavioral rating scales and identified several aspects of their design that made them prone to mischaracterize language impairments as socioemotional behavioral disorders. The purpose of this report is to provide an update and extension of the original audit. We consulted test manuals to evaluate: (1) representation of children with language impairments in their standardization samples; (2) presence of language, or academic items within their inventories; (3) accommodations for administering the measure to children with language impairments; and (4) procedures for identifying inordinately punitive ratings. Overlapping language and academic symptoms continued to be a problem across current behavioral rating scales. Improvements since Redmond 1 occurred in the representation of children with language impairments in standardization samples and in procedures for identifying inordinately punitive ratings. We discuss implications for clinical assessment, research programs, and instrument development
Redmond (2002) Revisited: Have Standardized Behavioral Rating Scales Gotten Better at Accommodating for Overlapping Symptoms with Language Impairment?
No full textSeventeen years ago, Redmond reviewed five standardized behavioral rating scales and identified several aspects of their design that made them prone to mischaracterize language impairments as socioemotional behavioral disorders. The purpose of this report is to provide an update and extension of the original audit. We consulted test manuals to evaluate: (1) representation of children with language impairments in their standardization samples; (2) presence of language, or academic items within their inventories; (3) accommodations for administering the measure to children with language impairments; and (4) procedures for identifying inordinately punitive ratings. Overlapping language and academic symptoms continued to be a problem across current behavioral rating scales. Improvements since Redmond occurred in the representation of children with language impairments in standardization samples and in procedures for identifying inordinately punitive ratings. We discuss implications for clinical assessment, research programs, and instrument development
Replication Data for: "The Long Arm and the Iron Fist: Authoritarian Crackdowns and Transnational Repression"
No full textReproduction material for "The Long Arm and the Iron Fist: Authoritarian Crackdowns and Transnational Repression" forthcoming in the Journal of Conflict Resolution with Alexander Dukalskis, Saipira Furstenberg and Redmond Scales
Supplemental Material - The Long Arm and the Iron Fist: Authoritarian Crackdowns and Transnational Repression
No full textSupplemental Material for The Long Arm and the Iron Fist: Authoritarian Crackdowns and Transnational Repression by Alexander Dukalskis, Saipira Furstenberg, Sebastian Hellmeier and Redmond Scales in Journal of Conflict Resolution</p
Supplemental Material - The Long Arm and the Iron Fist: Authoritarian Crackdowns and Transnational Repression
No full textSupplemental Material for The Long Arm and the Iron Fist: Authoritarian Crackdowns and Transnational Repression by Alexander Dukalskis, Saipira Furstenberg, Sebastian Hellmeier and Redmond Scales in Journal of Conflict Resolution</p
An alternative definition of order dependent dissipation scales
No full textWhile Kolmogorov's similarity hypothesis suggests that velocity structure functions scale with the mean dissipation \left and the viscosity , we find that the even order scales with \left. This implies that there are other cut-off lengths than the Kolmogorov length . These cut-off lengths are smaller than and decrease with increasing order and Reynolds-number. They are compared to a previous definition of order dependent dissipative scales by Schumacher~et.~al\cite{schumacher2007asymptotic}
Truncation of scales by relaxation
No full textThis paper is about a relaxation model for large-eddy simulation of turbulent flow that truncates the too small scales of motion by making sure that they do not get energy from the larger eddies. To verify that a box filter is introduced and the relaxation parameter is determined in such a way that the production of small, box-fitting scales is counteracted by the modeled dissipation. This dissipation-production balance is worked out with the help of Poincar\'{e}'s inequality, which results in a relaxation model that depends on the invariants of the velocity gradient. This model is discretized and equipped with a Schumann filter. It is successfully tested for isotropic turbulence as well as for turbulent channel flow
Is isotropy restored at small scales in freely decaying strongly stratified turbulence?
No full textWe analyse the scale-dependent anisotropy of homogeneous stratified turbulence. The Ozmidov scale l_N (Ozmidov 1965) helps to compare the relative effects of inertia and of the buoyancy force, and thus to quantify the rise of anisotropy in different scale ranges: at large scales l >> l_N the anisotropy due to strong stratification is dominant, whereas at small scales l << l_N, universal 3D isotropic characteristic of turbulence appear to be restored. We investigate the corresponding dynamics using Direct Numerical Simulations (DNS) in freely decaying turbulence at different stratification rates. We confirm the return to isotropy of the small scales by analyzing the orientation-dependent power spectrum and poloidal/toroidal/density energy modes. To some extent, many characteristics of isotropic universality are restored at small scales but, surprisingly, the density spectrum (also potential energy spectrum) plays a particular role
Temperature small scales statistics in turbulent convective tilted channel flow
No full textWe report here the small scales statistics of velocity en temperature in a turbulent convective flow : a channel connecting two chambers. This flow, differently from Rayleigh-Bénard, is independent from the thermal boundary layers and can be influenced by stratification if tilted. The probability distribution functions of the temperature and velocity are gaussian while the temperature power spectra exhibit a Bolgiano-Obukov scaling at all angles
Statistics of the subgrid scales after the shock-turbulence interaction
No full textThe interaction of a normal shock with isotropic turbulence (IT) represents a basic problem for studying some of the phenomena associated with high speed flows, such as hypersonic flight, supersonic combustion and Inertial Confinement Fusion (ICF). In general, in practical applications, the shock width is much smaller than the turbulence scales and the upstream turbulent Mach number is modest. In this case, recent high resolution shock-resolved Direct Numerical Simulations (DNS) (Ryu and Livescu, J. Fluid Mech., 756, R1, 2014) show that the interaction can be described by the Linear Interaction Approximation (LIA). By using LIA to alleviate the need to solve the shock, DNS post-shock data can be generated at much higher Reynolds numbers than previously possible. Here, such results with Taylor Reynolds number around are used to investigate the properties of the subgrid scales (SGS). In particular, it is shown that the shock interaction decreases the asymmetry of the SGS dissipation PDF as the shock Mach number increases, with a significant enhancement in size of the regions and magnitude of backscatter
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