Treated herein is the elastic buckling problem of Single-Walled Carbon Nanotubes (SCNTs) under axial compression. Critical buckling strains cr ε of stocky SCNTs (length/diameter less than 8) that have been obtained by modeling them as first-order shear deformation (thick) shell theory (FSDST). The buckling strains are compared with those obtained by commonly used thin shell theories, such as th...

We studied a 14-year-old girl who suffered fractures of her mandible and tegmen following a fall from a balance beam. Thirteen days after hospitalization, she developed severe, protracted, recurrent episodes of hyperventila. lion; subsequently, she suffered posthyperventilation apnea, which at times was prolonged and associated with severe hypoxemia with an arterial oxygen pressure as low as 25...

This study investigates geometrical non-linear analysis of composite circular cylindrical shells under external pressure over part of their surfaces and also shells subjected to combined axial compression and triangular external pressure. Donnell non-linear shell theory along with first order shear deformation theory (FOSD) are adopted in the analysis. In the case of combined axial compression ...

The thermomechanical buckling of simply supported thin shallow spherical shells made of functionally graded material is presented in this paper. A metal-ceramic functionally graded shell with a power law distribution for volume fraction is considered, where its properties vary gradually through the shell thickness direction from pure metal on the inner surface to pure ceramic on the outer surfa...

En algunos viveros forestales del centro y norte país se utilizan sustratos en los cuales es común el uso de aserrín pino fertilizantes liberación prolongada; insumos regionales reducen costos producción simplifican la nutrición las plantas. El objetivo presente estudio fue evaluar crecimiento Swietenia macrophylla Tabebuia donnell-smithii dos sustratos: S1 (turba, perlita, vermiculita 3:1:1) S...

Let X1, X2, X3, . . . be i.i.d. random variables (Here ”i.i.d.” means ”independent and identically distributed” ), s.t. Pr[Xi = 1] = p, Pr[Xi = 0] = 1 − p. Xi is also called Bernoulli random variable. Let Sn = X1 + · · · + Xn. We will be interested in the random variable Sn which is called Binomial random variable (Sn ∼ B(n, p)). If you toss a coin for n times, and Xi = 1 represents the event t...

COMPUTER INFORMATION SCIENCE RICHE II. LARRY DONNELL B.S. CLARK ALTANTA UNIVERSITY, 2009 THE PERFORMANCE OF HIGH-ORDER QAUDRATURE AMPLITUDE MODULATION SCHEMES FOR BROADBAND WIRELESS COMMUNICATIONS SYSTEMS Committee Chair: Khalil A. Shujaee. Ph. D. Thesis dated July 2012 The limited amount frequency spectrum available to wireless comnmnication systems makes it difficult to satisfy the rapidly gr...