The Role of Inflammatory Markers in Predicting Resectability of Pancreatic Ductal Adenocarcinoma.

Pancreatic adenocarcinoma is still considered as one of the most aggressive cancers with low percentages of respectability, despite recent advances in diagnosis. Assessment of preoperative inflammatory markers can increase the rates of resectability. Patients with potentially resectable pancreatic adenoinvesticarcinoma in a single pancreatic unit were included.

Review of management options for pancreatic pseudocysts.

Pancreatic pseudocysts (PPs) present a challenging problem for physicians dealing with pancreatic disorders. Their management demands the co-operation of surgeons, radiologists and gastroenterologists. Historically, they have been treated either conservatively or surgically, with acceptable rates of complications and recurrence.

Measure of orbital stickiness and chaos strength.

Patterns can be used effectively to characterize dynamical orbits as regular or chaotic. The proposed method focuses on local, epochal characterization of orbits as opposed to global characterization usually employed by most established measures. The "patterns method" provides essentially a measure of chaos strength for every extremum of a signal.

Characterization of chaos: a new, fast, and effective measure.

A new technique for characterization of the regular or chaotic nature of dynamical orbits has been discovered. It takes advantage of morphological and dynamical properties of orbits, and is very effective, at least for time-independent systems with two degrees of freedom. The new technique was initially designed with time-dependent and N-body systems in mind.

Chaotic collisionless evolution in galaxies and charged-particle beams.

Both galaxies and charged particle beams can exhibit collisionless evolution on surprisingly short time scales. This can be attributed to the dynamics of chaotic orbits. The chaos is often triggered by resonance caused by time dependence in the bulk potential, which acts almost identically for attractive gravitational forces and repulsive electrostatic forces.

Fluctuations do matter: large noise-enhanced halos in charged-particle beams.

The formation of beam halos has customarily been described in terms of a particle-core model in which the space-charge field of the oscillating core drives particles to large amplitudes. This model involves parametric resonance and predicts a hard upper bound to the orbital amplitude of the halo particles. We show that the presence of colored noise due to space-charge fluctuations and/or machine imperfections can eject particles to much larger amplitudes than would be inferred from parametric resonance alone.

Chaos and the continuum limit in the gravitational N-body problem. II. Nonintegrable potentials.

This paper continues a numerical investigation of the statistical properties of "frozen-N orbits," i.e., orbits evolved in frozen, time-independent N-body realizations of smooth density distributions rho corresponding to both integrable and nonintegrable potentials, allowing for 10(2.

Chaos, ergodicity, and the thermodynamics of lower-dimensional time-independent Hamiltonian systems.

This paper uses the assumptions of ergodicity and a microcanonical distribution to compute estimates of the largest Lyapunov exponents in lower-dimensional Hamiltonian systems. That the resulting estimates are in reasonable agreement with the actual values computed numerically corroborates the intuition that chaos in such systems can be understood as arising generically from a parametric instability and that this instability may be modeled by a stochastic-oscillator equation [cf. Casetti, Clementi, and Pettini, Phys.