In recent years, two concepts similar to /?-sequences have appeared, essential sequences and asymptotic sequences. This work explores the general nature of such sequences. Introduction. In the last three years, two concepts similar to that of Ä-sequences have appeared, asymptotic sequences and essential sequences. Motivated by these examples, this paper will study the general nature of such seq...

Ependymomas account for 2% of all intracranial tumours in adults. Considerable controversy continues to exist with regard to their prognostic factors and therapeutic management due to the rarity and the heterogeneity of series reported so far. The authors report a retrospective study of a homogenous population of 152 adult patients harbouring intracranial ependymomas from 24 French Neurosurgica...

background and aims: p504s (amacr) is a mitochondrial enzyme expressed in renal cell carcinoma. some of immunohistochemical markers in renal cell tumors are independent prognostic factor and show relation with histologic grading. amacr expression increases with higher histological grading in different tumors; however, in rcc it is not obvious. in this study, we tried to investigate if any relat...

abstractbackgroundand endotracheal intubation under direct vision in both anticipated and unexpecteddifficult intubation situations.: the lma ctrach system is a new device for airway managementmethodsdifferent types of elective surgeries. after randomly selecting the patients for intubationwith this new device, the airway characteristics, height, weight, dental overbiteand thyromental distance ...

PURPOSE The purpose of the study was to examine the association between income inequality and school violence and between the performance inequality and school violence in two international samples. METHODS The study used data from Trends in International Mathematics and Science Study 2011 and from the Central Intelligence Agency of United States which combined information about academic perf...

The association between grade retention in first grade and passing the third grade state accountability tests, the Texas Assessment of Knowledge and Skills (TAKS) reading and math, was investigated in a sample of 769 students who were recruited into the study when they were in first grade. Of these 769 students, 165 were retained in first grade and 604 were promoted. Using propensity matching, ...