Hierarchy of minimal flow units in the logarithmic layer

The minimal simulation boxes of the buffer layer of turbulent channels can be extended to the logarithmic and outer regions, where they contain a segment of streamwise velocity streak, and a vortex cluster. Smaller boxes restrict “healthy” turbulence closer to the wall, to a layer whose thickness scales with the spanwise size of the box. These minimal boxes burst quasiperiodically, and the bursting period for a band of wall distances grows linearly away from the wall, independently of the box size within the limits within which turbulence is well represented

Reply to Comments of Steuernagel on the Afshar's Experiment

We respond to criticism of our paper "Paradox in Wave-Paricle Duality for Non-Perturbative Measurements". We disagree with Steuernagel's derivation of the visibility of the Afshar experiment. To calculate the fringe visibility, Steuernagel utilizes two different experimental situations, i.e. the wire grid in the pattern minima and in the pattern maxima. In our assessment, this proceduere cannot lead to the correct result for the complementarity properties of wave-particle in one particular experimental set-up

GIRAFFE multiple integral field units at VLT: a unique tool to recover velocity fields of distant galaxies

The GIRAFFE spectrograph is unique in providing the integral field spectroscopy of fifteen distant galaxies at the same time. It has been successfully implemented at the second VLT unit within the FLAMES facility. We present GIRAFFE observations acquired during the Guaranteed Time Observation of the Paris Observatory, using total exposure times ranging from 6 to 12 hours. The reduced 3D cube of each galaxy has been deconvolved using our new package DisGal3D. This software has been written using the only assumption that UV light traces the emission line regions. The comparison between GIRAFFE spectra and HST imagery allows us to recover details on velocity fields as small as 0.3-0.4 arcsec. It has been successfully tested using Fabry Perot observations of nearby galaxies purposely redshifted to large distances. We present here preliminary results for three distant galaxies at 0.45< z < 0.65, whose velocity fields have been derived with exquisite spectral (R=10000) and spatial resolutions. Observed velocity fields range from disturbed fields expected in major merger events to those of regular spiral with minor perturbations. For the latter, one could accurately derive the dynamical major axis and the maximal rotational velocity. We conclude that dynamical properties of a large number of distant galaxies can be routinely derived at VLT. This opens a new avenue towards the understanding of the galaxy formation and evolution during the last 8 Gyr.Comment: 4 pages, 3 jpeg figures. to appear in A&

Learning Church: Catechisms and Lay Participation in Early New England Congregationalism

This thesis analyzes catechisms and catechizing in New England religious culture from 1628-1662. These question and answer documents were intended for comprehensive religious instruction of both children and adults, and thus provide a direct window into the worldview of New England laity. In the hands of ordinary men and women, catechisms became a profound tool of religious and ecclesiastical empowerment. This thesis argues that catechisms held an indispensable role in equipping early New England men and women to participate in the government and rituals of their nascent Congregational churches. Ministers wrote catechisms to equip laity for their responsibilities of structuring new churches and calling church leaders. Catechisms also played a part in shaping the process of church admissions, both by providing theological content and emotional expression of one’s religious experience that would be deemed sufficient to enter a particular church. Once in the church, laity turned again to their catechisms to learn a robust sacramental piety that was focused on the physical elements and their attendant actions. In early New England, catechisms were not merely instructional tools for children, but functioned as handbooks on how laity participated in church life

English Legal Thought, American Colonial Experience and the Creation of the United States’ Constitution

About the author Roberto O. Flores de Apodaca is a Junior studying History at Concordia University in Irvine, CA. He hopes to go to graduate school and eventually become a history professor

Dynamic Behavior of Tailings

This article presents results of samples tested on a resonant column apparatus. The samples were formed of soil coming from mining residues (tailings), the testing program makes emphasis in the variables that influence the behavior. Finally, the interpretation of the results is made with a knowledge-based procedure and a Masing type model