background: in the past 20 years, a dramatic improvement in the prognosis of patients with hepatoblastoma (hb)has been achieved by combining surgery and chemotherapy in several national and international trials.materials and methods: four children ( 3 girl and 1 boy) aged 34 days, 4 months, 13 months, and 1 year with meanage of 6.53 (±5.15) months were presented to our center from 2002 to 2009 ...

Our goal is to investigate the asymptotic behavior of center mass elephant random walk, which a discrete-time walk on integers with complete memory its whole history. In diffusive and critical regimes, we establish almost sure convergence, law iterated logarithm quadratic strong for walk. The normality, properly normalized, also provided. Finally, prove limit theorem in superdiffusive regime. A...

Many problems in statistical mechanics are formulated in terms of an Ndimensional vector J, with components Ji, i = 1, ..., N that take only binary values Ji = ±1. We will call such a vector an Ising vector. Its components represent for example a spin state (Ising model [1]), the occupancy of a site, or a synaptic component (neural networks [2]). In the thermodynamic limit N → ∞, only a subset ...

The movement of the center of mass (COM) during human walking has been hypothesized to follow a sinusoidal pattern in the vertical and mediolateral directions. The vertical COM displacement has been shown to increase with velocity, but little is known about the mediolateral movement of the COM. In our evaluation of the mediolateral COM displacement at several walking speeds, 10 normal subjects ...

cardiac manifestations of the hydatid cyst are relatively uncommon. cardiac involvement may lead to the compression of vital organs, pulmonary hypertension, pericardial effusion, and even anaphylaxis. a 45-year-old woman presented to the emergency department of tehran heart center with chest pain. cardiac examination revealed relatively muffled heart sounds. echocardiography demonstrated a roun...

This article shows how to use calculus to find the center of mass of a soft, vertically suspended, cylindrical helical spring, which necessarily is non-uniformly stretched by the action of gravity. A general expression for the vertical position of the center of mass is obtained and compared with other results in the literature.

Lagrange’s Method to find EOM 1. Identify number of generalized coordinates and any generalized forces 2. Choose generalized coordinates ξ1, ξ2, . . . 3. Find kinetic energy T and potential energy V in terms of these generalized coordinates 4. Assemble Lagrangian L = T − V 5. Express generalized forces in terms of the generalized coordinates δW = Fxδx δW = Ξjδξj • When finding generalized force...