1 À Jux ¼ ÀJð xd þ ueÞ de dt ¼ a þ b xd þ ue dd dt ¼ Àc À d xd þ ue a ¼ 1 À x t r .0 b ¼ I J 2 .0 c ¼ u À U t f .0 d ¼ UIð1 À uÞ J .0

The existence and uniqueness of a periodic solution of the system of differential equations d dt x(t) = A(t)x(t − ) are proved. In particular the Krasnoselskii’s fixed point theorem and the contraction mapping principle are used in the analysis. In addition, the notion of fundamental matrix solution coupled with Floquet theory is also employed.  

By using averaging functions, several new oscillation criteria are established for the half-linear damped differential equation-2-2-2-2 r(t) (x) +p(t) |x| x,r(t) (x) +q(t)|x| x=0, dx dx dx dx dt dt dt dt α α α α ψ ϕ ψ ⎛ ⎞ ⎛ ⎞ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎝ ⎠ ⎝ ⎠ and the more general equation-2-2 r(t) (x) +p(t) g(x),r(t) (x) +q(t)g(x)=0, d dx dx dx dx dt dt dt dt dt α α ψ ϕ ψ ⎛ ⎞ ⎛ ⎞ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎝ ⎠ ⎝ ⎠ ...

Research has been carried out with a device to observe the phenomenon of Rayleigh Benard convection, made glass box bounded by lower plate and an upper plate. The bottom is hotter than top which functions heat horizontal fluid layer from below. This study aims water molecule movement. observation medium was mixed teak sawdust as representation particles average density mean=0.99 g/cm3. variatio...

Background: In everyday life, people engage in situations involving the concurrent processing of motor (balance) and cognitive tasks (i.e., "dual task situations") that result in performance declines in at least one of the given tasks. The concurrent practice of both the motor and cognitive task may counteract these performance decrements. The purpose of this study was to examine the effects of...

P. J. Basser, S. Pajevic NICHD / NIH, Bethesda, MD, United States, CIT / NIH, Bethesda, MD, United States SYNOPSIS: We propose that a necessary condition for an optimally designed DT-MRI experiment is that a new normal distribution for the estimated diffusion tensor, p(D) ∝ exp(1/2 D:A:D), be characterized by an isotropic 4-order precision tensor, A. This requirement ensures that statistical pr...

Because there is little quantitative information about the hemodynamics of left ventricular diastolic events in man, single-plane cineangiographic left ventricular volume curves were quantitatively analyzed at 16.6 msec intervals to evaluate the rate and amount of left ventricular filling during the early passive stage of filling and during the time of atrial contraction. The peak rate of passi...

The relationships between the contractile characteristics and the sarcoplasmic reticulum (SR) function of rat atrial and ventricular trabeculae were compared. The isometric developed tension (DT) and the rates of contraction (+dT/d t) and relaxation (-dT/d t) normalized to cross-sectional area were 3.7, 2.2, and 1.8 times lower, respectively, in intact atrial strips compared with ventricular st...

BACKGROUND AND OBJECTIVE Escherichia coli O157:H7, an emerging pathogen, causes severe enteritis and the extraintestinal complication of hemolytic-uremic syndrome. The goal of this study was to evaluate the conjugate of E. coli O157: H7 lipopolysaccharide (LPS) with diphtheria toxoid (DT) as a candidate vaccine in mice model. MATERIAL AND METHODS LPS from E. coli O157:H7 was extracted by hot ...