Journal of The American Mosquito Control Association, 2009
Dengue is a serious public health problem worldwide. Biological control of its vector, Aedes aegy... more Dengue is a serious public health problem worldwide. Biological control of its vector, Aedes aegypti, remains a feasible option in light of increasing urbanization and insecticide resistance. We studied the dispersal and oviposition activity of Toxorhynchites moctezuma in a dengue-endemic urban area in SSonora, Mexico, to provide information about the potential of Toxorhynchites as a control agent for Ae. aegypti in arid areas. We released 210 and 100 laboratory-reared gravid females of Tx. moctezuma in 2 city blocks during the summer and fall of 1993. We set 3 1-liter containers and 1 car tire as sentinel traps at each of 10 backyards within each city block. Spatial and temporal patterns of dispersal and oviposition activity differed between city blocks and between releases. However, a Cox regression analysis showed no significant difference in the per-day probability of Tx. moctezuma oviposition events in sentinel traps between summer and fall releases. Per-day oviposition probability was nearly 5 times greater for sentineltraps that contained larvae of Ae. aegypti, suggesting a high specificity of the predator for its prey. The proportion of sentinel traps positive for Tx. moctezuma eggs did not increase substantially after the 8th day piost-release, reaching 66% and 23% for sentinel traps with and without Ae. aegypti larvae, respectively.
The phase-space approach to classical and quantum systems demands for advanced analytical tools. ... more The phase-space approach to classical and quantum systems demands for advanced analytical tools. Such an approach characterizes the evolution of a physical system through a set of variables, reducing to the canonically conjugate variables in the classical limit. It often happens that phase-space distributions can be written in terms of quadratic forms involving the above quoted variables. A significant analytical tool to treat these problems may come from the generalized many-variables Hermite polynomials, defined on quadratic forms in R(exp n). They form an orthonormal system in many dimensions and seem the natural tool to treat the harmonic oscillator dynamics in phase-space. In this contribution we discuss the properties of these polynomials and present some applications to physical problems.
It is pointed out that the Jacobi-elliptic functions are the natural basis to get generating func... more It is pointed out that the Jacobi-elliptic functions are the natural basis to get generating functions of the multivariable generalized Bessel functions. Analytical and numerical results are given of interest for applications.
We formulate in a rigorous way a wave theory of charged beam linear transport. The Wigner distrib... more We formulate in a rigorous way a wave theory of charged beam linear transport. The Wigner distribution function is introduced and provides the link with classical mechanics. Finally, the von Neumann equation is shown to coincide with the Liouville equation for the nonlinear transport.
In this article the theory of two-index Bessel functions is presented. Their generating function,... more In this article the theory of two-index Bessel functions is presented. Their generating function, series expansion, and integral representations are discussed. Their usefulness in physical problems is also discussed in the context of analysis of radiation emitted by relativistic electrons in two-frequency undulators. Finally, the theoretical analysis proving addition and multiplication theorems for two-index Bessel functions are completed and their
A recent paper stated that the photon-number distribution in a free-electron laser is always sub-... more A recent paper stated that the photon-number distribution in a free-electron laser is always sub-Poissonian. This statement is clearly in contradiction with well-known published results. In the recoilless approximation the photon statistics is Poissonian. However, for electron recoil different from zero, the photon-number distribution presents bunching (anti-bunching) for positive (negative) detuning parameter.
The brightness of the radiation emitted by an ultrarelativistic e-beam passing through a magnetic... more The brightness of the radiation emitted by an ultrarelativistic e-beam passing through a magnetic undulator is sensitive to the beam quality (namely, energy spread and emittances) and to the undulator characteristics (i.e., possible random errors both in intensity and direction of magnetization, etc.). We analyse the spectrum distortion induced by the above effects and discuss the possibility of using the undulator radiation as a diagnostic tool. Finally, we also study the importance of near-field effects when the radiation is detected unfocussed off-axis and how they can combine with the effects induced by the beam emittances to produce a larger on-axis inhomogeneous broadening.
The theory of Hermite polynomials of two variables and two indices is discussed herein. Within th... more The theory of Hermite polynomials of two variables and two indices is discussed herein. Within the context of phase-space formulation of classical and quantum mechanics, they play the same role as conventional Hermite polynomials in ordinary quantum mechanics. Finally their extension to m variables and m indices is analyzed.
This reprint discusses the quantum coherence properties of the FEL within the single electron non... more This reprint discusses the quantum coherence properties of the FEL within the single electron non-relativistic Hamiltonian picture. The problem is analyzed both in the single and multimode hypothesis.
Journal of The American Mosquito Control Association, 2009
Dengue is a serious public health problem worldwide. Biological control of its vector, Aedes aegy... more Dengue is a serious public health problem worldwide. Biological control of its vector, Aedes aegypti, remains a feasible option in light of increasing urbanization and insecticide resistance. We studied the dispersal and oviposition activity of Toxorhynchites moctezuma in a dengue-endemic urban area in SSonora, Mexico, to provide information about the potential of Toxorhynchites as a control agent for Ae. aegypti in arid areas. We released 210 and 100 laboratory-reared gravid females of Tx. moctezuma in 2 city blocks during the summer and fall of 1993. We set 3 1-liter containers and 1 car tire as sentinel traps at each of 10 backyards within each city block. Spatial and temporal patterns of dispersal and oviposition activity differed between city blocks and between releases. However, a Cox regression analysis showed no significant difference in the per-day probability of Tx. moctezuma oviposition events in sentinel traps between summer and fall releases. Per-day oviposition probability was nearly 5 times greater for sentineltraps that contained larvae of Ae. aegypti, suggesting a high specificity of the predator for its prey. The proportion of sentinel traps positive for Tx. moctezuma eggs did not increase substantially after the 8th day piost-release, reaching 66% and 23% for sentinel traps with and without Ae. aegypti larvae, respectively.
The phase-space approach to classical and quantum systems demands for advanced analytical tools. ... more The phase-space approach to classical and quantum systems demands for advanced analytical tools. Such an approach characterizes the evolution of a physical system through a set of variables, reducing to the canonically conjugate variables in the classical limit. It often happens that phase-space distributions can be written in terms of quadratic forms involving the above quoted variables. A significant analytical tool to treat these problems may come from the generalized many-variables Hermite polynomials, defined on quadratic forms in R(exp n). They form an orthonormal system in many dimensions and seem the natural tool to treat the harmonic oscillator dynamics in phase-space. In this contribution we discuss the properties of these polynomials and present some applications to physical problems.
It is pointed out that the Jacobi-elliptic functions are the natural basis to get generating func... more It is pointed out that the Jacobi-elliptic functions are the natural basis to get generating functions of the multivariable generalized Bessel functions. Analytical and numerical results are given of interest for applications.
We formulate in a rigorous way a wave theory of charged beam linear transport. The Wigner distrib... more We formulate in a rigorous way a wave theory of charged beam linear transport. The Wigner distribution function is introduced and provides the link with classical mechanics. Finally, the von Neumann equation is shown to coincide with the Liouville equation for the nonlinear transport.
In this article the theory of two-index Bessel functions is presented. Their generating function,... more In this article the theory of two-index Bessel functions is presented. Their generating function, series expansion, and integral representations are discussed. Their usefulness in physical problems is also discussed in the context of analysis of radiation emitted by relativistic electrons in two-frequency undulators. Finally, the theoretical analysis proving addition and multiplication theorems for two-index Bessel functions are completed and their
A recent paper stated that the photon-number distribution in a free-electron laser is always sub-... more A recent paper stated that the photon-number distribution in a free-electron laser is always sub-Poissonian. This statement is clearly in contradiction with well-known published results. In the recoilless approximation the photon statistics is Poissonian. However, for electron recoil different from zero, the photon-number distribution presents bunching (anti-bunching) for positive (negative) detuning parameter.
The brightness of the radiation emitted by an ultrarelativistic e-beam passing through a magnetic... more The brightness of the radiation emitted by an ultrarelativistic e-beam passing through a magnetic undulator is sensitive to the beam quality (namely, energy spread and emittances) and to the undulator characteristics (i.e., possible random errors both in intensity and direction of magnetization, etc.). We analyse the spectrum distortion induced by the above effects and discuss the possibility of using the undulator radiation as a diagnostic tool. Finally, we also study the importance of near-field effects when the radiation is detected unfocussed off-axis and how they can combine with the effects induced by the beam emittances to produce a larger on-axis inhomogeneous broadening.
The theory of Hermite polynomials of two variables and two indices is discussed herein. Within th... more The theory of Hermite polynomials of two variables and two indices is discussed herein. Within the context of phase-space formulation of classical and quantum mechanics, they play the same role as conventional Hermite polynomials in ordinary quantum mechanics. Finally their extension to m variables and m indices is analyzed.
This reprint discusses the quantum coherence properties of the FEL within the single electron non... more This reprint discusses the quantum coherence properties of the FEL within the single electron non-relativistic Hamiltonian picture. The problem is analyzed both in the single and multimode hypothesis.
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