For each real number E in ]0, 1], we describe the densest packing PE of two non-overlapping congruent ellipses of aspect ratio E in a square. We find three different patterns as E belongs to ]0, 1/2], [1/2, E0] where E0 = √ (6 √ 3− 3)/11, and [E0, 1]. The technique of unavoidable sets – used by Friedman for proving the optimality of square packings – allows to prove the optimality of each packi...

[1] We present new empirical and mechanistic models for predicting the export of organic carbon out of the surface ocean by sinking particles. To calibrate these models, we have compiled a synthesis of field observations related to ecosystem size structure, primary production and particle export from around the globe. The empirical model captures 61% of the observed variance in the ratio of par...

cardiovascular disorders continue to constitute major causes of morbidity and mortality in diabetic patients. in this study, the effect of chronic administration of sesame (sesamum indicum l) seed feeding was studied on aortic reactivity of streptozotocin (stz)-diabetic rats. male diabetic rats received sesame seed-mixed food at weight ratios of 3% and 6% for 7 weeks, one week after diabetes in...

A retrospective study was performed to determine the reliability of physical examination (PE), ultrasonography (US) and fine-needle aspiration cytology (FNA) in the evaluation of thyroid nodules. Preoperative diagnoses of 252 euthyroid patients comprised 126 with benign lesions, 114 with papillary carcinoma and 12 with follicular carcinoma made by PE, US and FNA were reviewed. The specificity o...

The choice of sexual identity in Drosophila is determined by a system that measures the X chromosome to autosome ratio (X/A). This system depends upon unequal expression of X-linked numerator genes in 1X and 2X nuclei. The numerators activate a special Sxl promoter, Sxl-Pe, in 2X/2A nuclei, but not 1X/2A nuclei. By multimerizing a conserved Sxl-Pe sequence block, we generated a gain-of-function...

Pulmonary embolism (PE) induces an acute increase in the right ventricle afterload that can lead to right-ventricular dysfunction (RVD) and eventually to circulatory collapse. Hemodynamic status and presence of RVD are important determinants of adverse outcomes in acute PE. Technologic progress allows computed tomography angiography (CTA) to give more information than accurate diagnosis of PE. ...

The novel technique proposed in this paper for dynamic cache size tuning is an enhancement of the previous MACSC (Model for Adaptive Cache Size Control) approach. Similar to its MACSC predecessor the Enhanced MACSC (E-MACSC) technique consistently maintains the given cache hit ratio. The focus of the research is presently on supporting small caching systems of limited recyclable memory resource...