For sites located in different climatic regions, we estimated the relationship between annual average probability distributionof exceeding a fixed rain attenuation, and carrier frequency range 16 to 100 GHz, zenith paths of GeoSurf satellite constellations. In these constellations attenuation is independent altitude number satellites. Rain iss calculated with Synthetic Storm Technique, reliable...

In this paper, using a simulation and modelling technique, the other cells interferences factor is obtained and compared with previous upper bounds. The effect of propagation parameters on other cells interferences is investigated. Two scenarios are studied, when the mobile chooses the nearest base station and when it chooses the least attenuation base station. The results indicate that that th...

For a collection of distributions over a countable support set, the worst case universal compression formulation by Shtarkov attempts to assign a universal distribution over the support set. The formulation aims to ensure that the universal distribution does not underestimate the probability of any element in the support set relative to distributions in the collection. When the alphabet is unco...

Optimum shielding of the radiation from particle accelerators requires knowledge of the attenuation characteristics of the shielding material. The most common material for shielding this radiation is concrete, which can be made using various materials of different densities as aggregates. These different concrete mixes can have very different attenuation characteristics. Information about the a...

Introduction: Monte Carlo (MC) is the most common method for simulating virtual SPECT projections. It is useful for optimizing procedures, evaluating correction algorithms and more recently image reconstruction as a forward projector in iterative algorithms; however, the main drawback of MC is its long run time. We introduced a model based method considering the effect of body attenuation and i...

Paraquat (PQ) is a widely used herbicide. However, a large number of cases of accidental or suicidal poisoning from PQ has been reported. Membrane damage induced by lipid peroxidation, inactivation of protein or damage to DNA by radical formation have been suggested as toxicity mechanisms of PQ. In the present work, the effects of atropine, propranolol, procainamide and dipyridamole on PQ-...

Seismic attenuation measurements provide a powerful tool for sampling mantle properties. Laboratory experiments provide calibrations at seismic frequencies and mantle temperatures for dry meltfree rocks, but require 10210 extrapolations in grain size to mantle conditions; also, the effects of water and melt are not well understood. At the same time, body wave attenuation measured from dense bro...

BACKGROUND Coronary artery calcium (CAC) assessed by non-contrast cardiac CT has been shown to be an independent factor from the Framingham risk factors in predicting cardiovascular events. However, many patients with acute coronary syndrome (ACS) have low CAC score. A recent study that re-analyzed the previous CAC CT scan of MESA cohort showed that in subjects with global lower density, CAC wa...