Comment on the existence of a long range correlation in the geomagnetic disturbance storm time (Dst) index

Very recently (Banerjee et al. in Astrophys. Space, doi:1007/s10509-011-0836-1, 2011) the statistics of geomagnetic Disturbance storm (Dst) index have been addressed, and the conclusion from this analysis suggests that the underlying dynamical process can be modeled as a fractional Brownian motion with persistent long-range correlations. In this comment we expose several misconceptions and flaws in the statistical analysis of that work. On the basis of these arguments, the former conclusion should be revisited.

Influence of gravity on heavy particle statistics in turbulent channel and pipe flow at matched Kàrmàn number

In this work, we use large eddy simulations (LES) and Lagrangian tracking to study the influence of gravity on particle statistics in a fully developed turbulent upward/downward flow in a vertical channel and pipe at matched Kàrmàn number. Only drag and gravity are considered in the equation of motion for solid particles, which are assumed to have no influence on the flow field. Particle interactions with the wall are fully elastic. Our findings obtained from the particle statistics confirm that: (i) the gravity seems to modify both the quantitative and qualitative behavior of the particle distribution and statistics of the particle velocity in wall normal direction; (ii) however, only the quantitative behavior of velocity particle in streamwise direction and the root mean square of velocity components is modified; (iii) the statistics of fluid and particles coincide very well near the wall in channel and pipe flow with equal Kàrmàn number; (iv) pipe curvature seems to have quantitative and qualitative influence on the particle velocity and on the particle concentration in wall normal direction.

Substance abuse and mental health statistics sourcebook /

Prepared by Beatrice A. Rouse of the Substance Abuse and Mental Health Services Administration, Office of Applied Studies.

Procedures used in compiling monthly statistics relating to employment and pay rolls.

Reproduced from type-written copy.

Consumer price index, user survey results.

"June 1990."

Development of a wet weather safety index. Final report.

Texas State Department of Highways and Public Transportation, Austin

Statistics of extremes /

Includes bibliography: p. [349]-371 and index.

National death index user's manual.

Shipping list no.: 98-0050-P.

Index and bulk parameters for frequency-direction spectra measured at CERC Field Research Facility, September 1986 to August 1987 /

Cover title.

Index and bulk parameters for frequency-direction spectra measured at CERC Field Research Facility : September 1987 to August 1988 /

Cover title.

Directory of federal statistics for local areas : a guide to sources, urban update 1977-1978.

Includes cumulative index.

Proceedings of the Suffolk Institute of Archæology, Statistics, and Natural History.

Mode of access: Internet.

Indice de precios al consumidor para familias obreras en Puerto Rico. Consumer price index for wage earners' families in Puerto Rico. Average indexes for fiscal years ...

Description based on: 1965 y 1966.

Indice de precios al consumidor en Puerto Rico. Consumer price index in Puerto Rico. All families, wage earners' families. Average indexes for fiscal year ...

Mode of access: Internet.