the aim of the current study was to determine the pattern, presentation and management of foreign body aspiration in our  population.  this prospective study comprised 55 patients with foreign body aspiration admitted to our department from january 2009 to december 2011. all patients underwent rigid bronchoscopy under local or general anesthesia. the patients’ demographic information along with...

the main aim of this paper is to extend the recently developed methods for calculating the buckling loads of planar symmetric frames to include the effect of semi-rigidity of the joints. this is achieved by decomposing a symmetric model into two submodels and then healing them in such a manner that the ::::union:::: of the eigenvalues of the healed submodels result in the eigenvalues of the ent...

let $r$ be an arbitrary ring with identity and $m$ a right $r$-module with $s=$ end$_r(m)$. the module $m$ is called {it rickart} if for any $fin s$, $r_m(f)=se$ for some $e^2=ein s$. we prove that some results of principally projective rings and baer modules can be extended to rickart modules for this general settings.

let r be a ring,  be an endomorphism of r and mr be a -rigid module. amodule mr is called quasi-baer if the right annihilator of a principal submodule of r isgenerated by an idempotent. it is shown that an r-module mr is a quasi-baer module if andonly if m[[x]] is a quasi-baer module over the skew power series ring r[[x; ]].

foreign body ingestion and aspiration is among the most common causes of emergency department visit associated with high morbidity and mortality. ingested and aspirated denture is rare conditions being scarcely reported in the literature. we herein report a 57-year-old man who presented with 2-day history of liquid and solid dysphagia who was diagnosed to have impacted denture in esophagus sinc...