Schoenlein-Henoch syndrome in adults--current aspects

Schoenlein-Henoch purpura is characterized clinically by palpable purpura, mainly on the legs, with varying degrees of gastrointestinal, articular and renal involvement. Renal involvement is often more severe in the adult than in children and it often determines the outcome of the disease. Schoenlein-Henoch purpura is also characterized by an IgA-vasculitis, which may be triggered by several non-specific antigenic factors. Its pathogenesis is still unclear, but a dysfunction of the IgA immune system has been demonstrated. We discuss the anatomo-clinical, therapeutic and etiopathogenic aspects of this syndrome according to today's knowledge.     

Numerical implementation of a new rheological law for argilites

This article presents the numerical implementation of an elastoplastic behavior model suitable for estimating the damage produced when excavating galleries in deep argilite layers. The main rheological features of the model are related to post-peak behavior, brittle fracture, softening and dilatancy effects. Damage of the rock may increase significantly the hydraulic permeability and vice versa. We focus on numerical difficulties such as suitable calculations for plastic flow at very low confinement levels and those resulting from following the confinement factor in such a way that the algorithms converge until physical collapse. The numerical results obtained with a 2D simulation are in good agreement with generally observed phenomena. Dilatancy produces instantaneous cohesion, which disappears with time. Increasing permeability speeds up this tendency.     

High‐rate clarification of municipal wastewaters: a brief appraisal

Pilot‐plant studies on the treatment of three wastewaters (biological aerated flooded filter (BAFF) backwash water, post‐primary settling tank effluent and BAFF effluent) have been conducted using a ballasted sedimentation process (ACTIFLO^®) coupled with ferric chloride and polyaluminium chloride (PACl) coagulants. The response of the process to shock loads of high solids concentrations was also investigated. Results showed over 80% turbidity, 70% suspended solids, and 50% COD removals to be achievable at rise rates in excess of 80 m h^?1 and dose rates of 10–20 mg dm^?3 Fe. Slightly improved performance was attained using PACL at half the weight concentration (but about the same molar concentration) as that of Fe. No pH adjustment was necessary and process performance was not significantly influenced by changes in hydraulic loading rate. Effluent quality was largely unaffected by shock organic loads provided coagulant dosing was commensurately increased. Non‐ideal flow through the plant was apparent from the measured residence time, which was ～25% less than that calculated for plug flow. Clarification data were comparable to those reported for other high‐rate clarification (HRC) processes, with somewhat improved performance in terms of hydraulic retention time and coagulant use. Copyright © 2004 Society of Chemical Industry     

Lower and upper bounds for the mixed capacitated arc routing problem

This paper presents a linear formulation, valid inequalities, and a lower bounding procedure for the mixed capacitated arc routing problem (MCARP). Moreover, three constructive heuristics and a memetic algorithm are described. Lower and upper bounds have been compared on two sets of randomly generated instances. Computational results show that the average gaps between lower and upper bounds are 0.51% and 0.33%, respectively.     

Use of the MMPI-2 in American Indians: I. Comparability of the MMPI-2 Between Two Tribes and With the MMPI-2 Normative Group.

The comparability of the MMPI-2 in American Indians with the MMPI-2 normative group was investigated in a sample of 535 Southwestern and 297 Plains American Indian tribal members with contrasting sociocultural and historical origins. Both American Indian tribal groups had clinically significant higher T scores (>5 T points) on 5 validity and clinical scales, 6 content scales, and 2 supplementary scales than did the MMPI-2 normative group. There were no significant differences between the 2 tribal groups on any of the MMPI-2 clinical, content, or supplementary scales. Matching members of both tribes with persons in the MMPI-2 normative group on the basis of age, gender, and education reduced the magnitude of the differences between the 2 groups on all of these scales, although the differences in T scores still exceeded 5 T points. It appears likely that the MMPI-2 differences of these 2 American Indian groups from the normative group may reflect their adverse historical, social, and economic conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)