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Numerical invariants of rank2 arithmetically buchsbaum sheaves
(1989)We study rank2 reflexive sheaves on P3 whose sections are Buchsbaum curves, giving vanishing theorems for the cohomology and bounds and gaps for the existence range of their Chern classes. These results are applied to ... 
The Monte Carlo Method for Semiconductor Device Simulation
(Springer Vienna, 1989)The application of the Monte Carlo method to the simulation of semiconductor devices is presented. A review of the physics of transport in semiconductors is given, followed by an introduction to the physics of semiconductor ... 
Irreducible families of curves with fixed cohomology
(1989)One of the classical ways for studying the problem of the classification of curves in the projective space was the investigation of the irreducible families of curves, and this approach led to the notion of Hilbert scheme. ... 
MonteCarlo Simulation as a Novel Technique in the Study of Shallow Centers
(Institute of Physics, 1989)We present the Monte Carlo technique as a novel numerical method to investigate recombination and generation processes from shallow impurity centers. In particular, we provide a firstprinciple derivation of the microscopic ... 
Multiplicity of subharmonic solutions of forced Hamiltonian systems near an equilibrium
(Springer Verlag (Germany), 1989)We prove existence and multiplicity of long time periodic solutions for a class of nonlinear nonautonomous Hamiltonian systems locally near an equilibrium solution. The result relies on a variational principle and on the ... 
Multiplicity of kTperiodic solutions near a given Tperiodic solution for nonlinear Hamiltonian systems
(Khayyam Publishing, 1989) 
Der Atomstaat
(Landeszentrale für Politische Bildung NordrheinWestfalen, 1989)Selbst ausgereifte Technologien haben Nebenwirkungen (sogenannte). Es läßt sich dann über Sicherheit diskutieren und über Risiken  vertretbare natürlich oder unvertretbare: über radioaktive Niedrigstrahlung etwa oder über ... 
Deficiency modules and specializations
(1990)Given a family of curves in the projective space we study how their deficiency modules can change. This has a geometrical translation in the problem of determining how the liaison class of a flat family of curves can change. ... 
Construction of families of curves from finite length graded modules
(1990)We construct particular families of projective space curves starting from finite length graded modules, exhibiting several phenomena of specializations. The main tool is the Rao construction via a free resolution of the module. 
Intersubband relaxation of hot carriers in coupled quantum wells
(SPIE, 1990)We use an ensemble Monte Carlo simulation of coupled electrons, holes and polar optical phonons in multiple quantum well systems to model the intersubband relaxation of hot carriers measured in ultrafast optical experiments. ... 
Effect of phonon confinement in quantum well systems
(SPIE, 1990)We discuss the role of LOphonons confinement in quantum well systems, by comparing two different phonon models that have been proposed in the literature. A critical discussion concerning the use of macroscopic approaches ... 
Radial gauge in poincare gauge fieldtheories
(AMER INST PHYSICS, 1990)The generalization of the Fock–Schwinger or ‘‘radial’’ gauge condition xiAi =0 to the gauge theories of the Poincaré group, which describe the gravitational field, is treated. It is shown that the choice of a radial gauge ... 
The variety of module structures
(1990)Introduction. In this paper we study how is "structured" the set of curves of the projective space having assigned dimensions for the cohomology groups Hi (P3, Jx (t)). In particular, we show that almost always this locally ...