The main purpose of the present work is multi-objective shape optimization of a projectile tip for impacting and normal penetrating. Velocity drop, weight and inner volume of projectile have been considered as three conflicting objective functions.  For this purpose, at the first step, finite element modeling was done using ABAQUS/Explicit and projectile penetration was examined in different ge...

Background: Pericardial effusion and cardiac tamponade are the rare complications of peripherally inserted central catheters (PICC insertion) in extreme low birth weight infants. In this regard, paying attention to these complications is of utmost importance, because they can result in infant death. Case report: The case of our infant is a sa...

We report a 71 year old lady who presented with weight loss, rectal bleeding and bilateral foot drop having been previously fit and well. Clinical examination, laboratory investigation and postmortem examination confirmed the diagnosis of active Crohn's disease and acute peripheral neuropathy. The clinical course of this patient suggests that the peripheral neuropathy might have resulted from t...

Two cases of patients with morbid obesity submitted to bariatric surgery and with considerable weight loss are presented. During follow-up, they complained of weakness in the legs and the physical examination showed reduction of ankle dorsiflexion muscle strength (foot drop). In these cases, the symptoms subsided spontaneously. A literature review is presented.

Rapid development of engineering activities expands through a variety of rock engineering processes such as drilling, blasting, mining and mineral processing. These activities require rock dynamic fracture mechanics method to characterize the rock behavior. Dynamic fracture toughness is an important parameter for the analysis of engineering structures under dynamic loading. Several experimental...

A model describing the evaporation of an isolated drop of a multicomponent fuel containing hundreds of species has been developed. The model is based on Continuous Thermodynamics concepts wherein the composition of a fuel is statistically described using a Probability Distribution Function (PDF). Following previous studies, this PDF is parametrized on the species molar weight. However, unlike i...

Fatigue precracked specimens of three titanium alloys (6Al-4V, ELI, and Timetal 5111) were dynamically loaded in a drop weight tower system while the dynamic fracture toughness was inferred using Coherent Gradient Sensing, crack opening displacement, or strain gage methods. A comparison of the initiation toughness of the three materials as a function of loading rate and specimen thickness is made.

H ypokalemic paralysis can occur primarily as a result of an enhanced shift of potassium ions into cells or secondarily from excessive potassium loss. It typically involves proximal muscles in a symmetric fashion. We describe a patient with asymmetric distal weakness that turned out to be due to hypokalemia and responded to potassium replacement. A 65 year old gentleman woke up one morning to f...

We investigate the effects of fluid elasticity on the dynamics of filament thinning and drop breakup processes in a cross-slot microchannel. Elasticity effects are examined using dilute aqueous polymeric solutions of molecular weight (MW) ranging from 1.5×103 to 1.8×107. Results for polymeric fluids are compared to those for a viscous Newtonian fluid. The shearing or continuous phase that induc...