Photonuclear reactions of light nuclei below a mass of
A
=
60
are planned to be studied experimentally and theoretically with the PANDORA (Photo-Absorption of Nuclei and Decay Observation for ...Reactions in Astrophysics) project. Two experimental methods, virtual photon excitation by proton scattering and real photo absorption by a high-brilliance
γ
-ray beam produced by laser Compton scattering, will be applied to measure the photoabsorption cross sections and decay branching ratio of each decay channel as a function of the photon energy. Several nuclear models, e.g. anti-symmetrized molecular dynamics, mean-field and beyond-mean-field models, a large-scale shell model, and ab initio models, will be employed to predict the photonuclear reactions. The uncertainty in the model predictions will be evaluated based on the discrepancies between the model predictions and experimental data. The data and predictions will be implemented in the general reaction calculation code, TALYS. The results will be applied to the simulation of the photo-disintegration process of ultra-high-energy cosmic rays in inter-galactic propagation.
Photo-nuclear reactions of light nuclei below a mass of $A=60$ are studied
experimentally and theoretically by the PANDORA (Photo-Absorption of Nuclei and
Decay Observation for Reactions in ...Astrophysics) project. Two experimental
methods, virtual-photon excitation by proton scattering and real-photo
absorption by a high-brilliance gamma-ray beam produced by laser Compton
scattering, will be applied to measure the photo-absorption cross sections and
the decay branching ratio of each decay channel as a function of the photon
energy. Several nuclear models, e.g. anti-symmetrized molecular dynamics,
mean-field type models, a large-scale shell model, and ab initio models, will
be employed to predict the photo-nuclear reactions. The uncertainty in the
model predictions will be evaluated from the discrepancies between the model
predictions and the experimental data. The data and the predictions will be
implemented in a general reaction calculation code TALYS . The results will be
applied to the simulation of the photo-disintegration process of
ultra-high-energy cosmic rays in inter-galactic propagation.
Photo-nuclear reactions of light nuclei below a mass of \(A=60\) are studied experimentally and theoretically by the PANDORA (Photo-Absorption of Nuclei and Decay Observation for Reactions in ...Astrophysics) project. Two experimental methods, virtual-photon excitation by proton scattering and real-photo absorption by a high-brilliance gamma-ray beam produced by laser Compton scattering, will be applied to measure the photo-absorption cross sections and the decay branching ratio of each decay channel as a function of the photon energy. Several nuclear models, e.g. anti-symmetrized molecular dynamics, mean-field type models, a large-scale shell model, and ab initio models, will be employed to predict the photo-nuclear reactions. The uncertainty in the model predictions will be evaluated from the discrepancies between the model predictions and the experimental data. The data and the predictions will be implemented in a general reaction calculation code TALYS . The results will be applied to the simulation of the photo-disintegration process of ultra-high-energy cosmic rays in inter-galactic propagation.
Our research addresses the problem of developing knowledge-based agents that incorporate the knowledge of subject matter experts. Our approach is to develop a learning and problem solving agent, ...which can be directly taught by a subject matter expert by explaining it how to solve specific problems, and by critiquing its attempts to solve new problems. Because the accuracy of the agent's reasoning depends on the rules from its knowledge base, the process of rule improvement is very important. This dissertation presents an integrated set of methods to assist a subject matter expert in refining the rules from an agent's knowledge base, to incorporate his problem solving expertise. This dissertation presents methods to discover incompletely refined rules and to propose suggestions for their improvement; to guide the expert during the rule refinement process, focusing his attention on the reasoning steps that need to be analyzed; to refine the applicability condition of over-generalized and over-specialized rules; to modify a learned rule using a lazy refinement method; and to extend the agent's ontology to eliminate the rules' exceptions. These methods complement each other and create an integrated approach to the rule refinement problem in an evolving representation space, resulting in refined problem solving rules, which will assure a higher degree of correctness of the solutions generated by the agent. These rule refinement methods have been implemented in the Disciple learning agent shell, and have been evaluated during several experiments in complex application domains.
The dynamical equations related to Kepler motion are scale-invariant. This means that the dynamical model itself, described by these equations is space scale-invariant: it should work at the ...microscopic level just as well as it works at the macroscopic level. Why then the first quantization? Is it telling something we could not read by the classical physics? The Bohr's case of quantization, which initiated the first quantization, is presented here as a Newtonian instance of natural philosophy: the force characterizing the model has to account for some experimental observations related to motion. It turns out that the only thing worth considering from the side of quantum revolution is the inspiration it could bring, for instance in problems of astrophysics, the branch of physics which actually helped start the quantum theory. That inspiration existed historically, but was lost due to the attitude of our spirit, which tends to see things "quantal" different from, and more fundamental than, things "classical." This work aims to present all things in a single classical order, and thus explain some of the present-day quantum theoretical findings. c 2014 Physics Essays Publication. http://dx.doi.org/10.4006/0836-1398-21.2.204
The dynamical equations related to Kepler motion are scale-invariant. This means that the dynamical model itself, described by these equations is space scale-invariant: it should work at the ...microscopic level just as well as it works at the macroscopic level. Why then the first quantization?
Is it telling something we could not read by the classical physics? The Bohr's case of quantization, which initiated the first quantization, is presented here as a Newtonian instance of natural philosophy: the force characterizing the model has to account for some experimental observations
related to motion. It turns out that the only thing worth considering from the side of quantum revolution is the inspiration it could bring, for instance in problems of astrophysics, the branch of physics which actually helped start the quantum theory. That inspiration existed historically,
but was lost due to the attitude of our spirit, which tends to see things "quantal" different from, and more fundamental than, things "classical." This work aims to present all things in a single classical order, and thus explain some of the present-day quantum theoretical
findings.
