Background: Pneumomediastinum (PM) is caused by alveolar rapture. If air leak persists, subcutaneous emphysema occurs. The PM and subcutaneous emphysema have various etiologies. Common causes are respiratory tract infections and asthma exacerbations. Rarely, the PM occurs secondary to foreign body aspiration, and the life-threatening complications will occur without proper treatment. Case repo...

lack of adequate organic matter (om) in the agricultural soils of iran is responsible for the poor physical condition of these soils. thus, increasing soil om is very important. on the other hand, the eutrophication of surface water caused by continuous use of phosphorus (p) fertilizer has created an interest in the combined use of organic wastes and p fertilizer. hence, the present study was u...

We introduce the notion of weighted watermarking for proof-of-ownership watermark protection of multimedia works that are the product of more than one author and where each author is considered to be of different importance relative to the other authors. We specifically examine weighted segmented watermarking for still images and generalise previous work on performance measurement of watermark ...

The cyclic segmented parallel prefix (CSPP) circuit is a varation on parallel prefix. Whereas ordinary parallel prefix computes prefix sums of a vector from the beginning, CSPP allows the starting point to move arbitrarily, with the data “wrapping around.” The wraparound is widely useful. We have used CSPP to redesign many components of a superscalar processor to run in time logarithmic in the ...

In some of the challenging digital rock applications trade-off between model resolution and representative elemental volume is not captured in a single satisfying minimum requirements for both aspects. wide range lithofacies found carbonate reservoir rocks, facies fall this category, where large pores, ooids or vugs, are connected by small scale porous structures that could have orders magnitud...

This paper analyzes price collusion in a repeated game with two submarkets: standard and premium quality segment. Within this setting, we study four types of price-fixing agreement: (i) segment-wide cartel the submarket only, (ii) (iii) cartels, (iv) an industry-wide cartel. We present complete characterization collusive pricing equilibrium examine corresponding effect on market shares welfare....

Background: Accurate brain tissue segmentation from magnetic resonance (MR) images is an important step in analysis of cerebral images. There are software packages which are used for brain segmentation. These packages usually contain a set of skull stripping, intensity non-uniformity (bias) correction and segmentation routines. Thus, assessment of the quality of the segmented gray matter (GM), ...