Guidelines for the Inclusion of Left-Turn Lanes at Rural Highway Intersections, HR-147, 1970

Provision of left turn lanes is a major problem which lacks an objective approach. Various techniques and procedures in use have been reviewed. Traffic characteristics at typical Iowa intersections have been measured. A rational approach for inclusion of a left turn lane has been developed, based on relating the benefits to the road user to the cost of providing the added turing lane. An analysis of field data gathered under this project indicates that the use of theoretical distribution to describe vehicle headways is not applicable to rural Iowa two lane roads. As an alternate approach the mass of field data gathered were examined using multiple regression techniques to yield equations for predicting stops and delays. The benefit-cost ratio technique is recommended as the criterion for decision making.

Granular Base Materials for Flexible Pavements, HR-131, 1970

The coefficients of relative strength (CORS) of base courses for use in the American association state highway officials (AASHO) interim guide for the design of flexible pavements are determined here. Based on (1) volumetric strain--axial strain relationships at minimum volume, and (2) effective stress ratio-cohesion relationships at maximum effective stress ratio, CORS were determined from the results of laboratory triaxial tests on both asphalt-treated and untreated aggregate base course materials. The researchers conclude that volumetric strain-axial strain at minimum volume appear to be appropriate parameters for determining CORS.

Preliminary Studies of Remedial Measures for the Prevention of Bridge Deck Deterioration, HR-146, 1970

Four series of five specimens each were investigated for static and fatigue strength. These four series differed in that there were two variables, the first being the subsidence of concrete around reinforcing bars and the second being shrinkage due to two different curing conditions. The combinations of these variables were then compared to each other by use of, load-deflection curves and S-H fatigue curves.

[11 lettres de Jules Massenet à Robert Gangnat, 1903-1909]

Lui recommande Monsieur Chotteau : "J'estime grandement cet homme si parfaitement méritant ; c'est un lettré digne de votre protection et j'ai pour lui une amitié reconnaissante et fidèle" (9 janvier 1903). Espère recevoir chez lui ses droits échus (7 avril). Évoque sa collaboration avec Paul Ginisty, relate son travail sur "Ariane" dont le poème de Catulle Mendès est "admirable de passion, de pittoresque et de sentiments humains." (9 octobre 1904). L'informe que dans quelques jours vont commencer les répétitions générales de "Chérubin" à Monte Carlo (25 janvier 1905). Regrette enfin d'avoir raté sa visite du Nouvel An : "j'avais juré que je serai le premier à vous voir." (2 janvier 1906)

Cab45 is required for Ca(2+)-dependent secretory cargo sorting at the trans-Golgi network

Ca(2+) import into the lumen of the trans-Golgi network (TGN) by the secretory pathway calcium ATPase1 (SPCA1) is required for the sorting of secretory cargo. How is Ca(2+) retained in the lumen of the Golgi, and what is its role in cargo sorting? We show here that a soluble, lumenal Golgi resident protein, Cab45, is required for SPCA1-dependent Ca(2+) import into the TGN; it binds secretory cargo in a Ca(2+)-dependent reaction and is required for its sorting at the TGN.

Industrialisation et sociétés d'Europe occidentale, 1880-1970 / sous la dir. de Patrick Fridenson

Collection : Collection Mouvement social