Under the Egyptian program for radiation safety and control, airborne radioactivity measurements and radiological dose assessment were conducted in some phosphate and uranium mines. Abu-Tartor mine is one of the biggest underground phosphate mines in Egypt. Airborne radioactivity, radon ((222)Rn) and its short-lived decay products (progenies) and thoron ((220)Rn), were measured in selected loca...

Argonne National Laboratory (ANL) recently discovered that a class of inexpensive and biologically benign fluids absorb radon gas with a high efficiency at room temperature, and release radon at slightly elevated temperatures (50-60 OC). This has led to the development of simple and inexpensive devices for continuous removal of radon from air. Such devices offer numerous advantages over convent...

Results of a soil radon survey accomplished by 2 different methods during 2 different periods in the area of Tlamacas Mountain are presented. The first study, carried out from 15-APR-2010 to 09-MAY-2010 in 30 measurement sites by means of CR39 solid state nuclear detectors, shows 2 active zones with intensive radon emanation with a characteristic dimension of about 300 meters located in the nor...

This paper studies data from the wholesale fruit and vegetables market in Marseille. We have details of counteroffers to the prices that were proposed by the seller even when no transaction took place. With a simple theoretical model we analyse the evolution of prices during the day and in particular the relation between the final price struck and the proposals of the two parties. Periods with ...

Building on Crawford and Sobel’s (1982) general communication model, this paper introduces the possibility that players are non-strategic. The sender may be honest and have a preference for speaking truthfully. The receiver may be naive and erroneously believe that the sender is truthful. In contrast to the predictions of the fully-strategic model, we show that there is an equilibrium where com...