Social and Economic Consequences of the Dickey-Lincoln School Hydro-Electric Power Development on the Upper St. John Valley, Maine -- : Phase 1, Preconstruction

The intention of this report is to present a still picture of the selected area as of the summer of 1966. The emphasis is on empirical relationships. The data contained herein will provide a base for subsequent analysis. Thus little attempt is made to cast the findings of the study in a theoretical framework. Later publications will utilize relevant theory and research to analyze the social and economic changes in an area related to the building of the Dickey and Lincoln School Dams. It is presumed that this particular report and its statistical sup-plement will be of particular interest to decision makers at the local, state and national levels who have expressed a desire for more information about the area in order to provide them with a better basis for making decisions associated with the Dickey-Lincoln School project

Social and Economic Consequences of the Dickey-Lincoln School hydro-electric power development on the Upper St. John Valley, Maine: Phase 1, Preconstruction

The intention of this report is to present a still picture of the selected area as of the summer of 1966. The emphasis is on empirical relationships. The data contained herein will provide a base for subsequent analysis. Thus little attempt is made to cast the findings of the study in a theoretical framework. Later publications will utilize relevant theory and research to analyze the social and economic changes in an area related to the building of the Dickey and Lincoln School Dams. It is presumed that this particular report and its statistical supplement will be of particular interest to decision makers at the local, state and national levels who have expressed a desire for more information about the area in order to provide them with a better basis for making decisions associated with the Dickey-Lincoln School project

Social and Economic Consequences of the Dickey-Lincoln School Hydro-Electric Power Development on the Upper St. John Valley, Maine -- : Phase 1, Preconstruction

The intention of this report is to present a still picture of the selected area as of the summer of 1966. The emphasis is on empirical relationships. The data contained herein will provide a base for subsequent analysis. Thus little attempt is made to cast the findings of the study in a theoretical framework. Later publications will utilize relevant theory and research to analyze the social and economic changes in an area related to the building of the Dickey and Lincoln School Dams. It is presumed that this particular report and its statistical sup-plement will be of particular interest to decision makers at the local, state and national levels who have expressed a desire for more information about the area in order to provide them with a better basis for making decisions associated with the Dickey-Lincoln School project

Improved modelling of helium and tritium production for spallation targets

Reliable predictions of light charged particle production in spallation reactions are important to correctly assess gas production in spallation targets. In particular, the helium production yield is important for assessing damage in the window separating the accelerator vacuum from a spallation target, and tritium is a major contributor to the target radioactivity. Up to now, the models available in the MCNPX transport code, including the widely used default option Bertini-Dresner and the INCL4.2-ABLA combination of models, were not able to correctly predict light charged particle yields. The work done recently on both the intranuclear cascade model INCL4, in which cluster emission through a coalescence process has been introduced, and on the de-excitation model ABLA allows correcting these deficiencies. This paper shows that the coalescence emission plays an important role in the tritium and $^3He$ production and that the combination of the newly developed versions of the codes, INCL4.5-ABLA07, now lead to good predictions of both helium and tritium cross sections over a wide incident energy range. Comparisons with other available models are also presented.Comment: 6 pages, 9 figure

Motion of Isolated bodies

It is shown that sufficiently smooth initial data for the Einstein-dust or the Einstein-Maxwell-dust equations with non-negative density of compact support develop into solutions representing isolated bodies in the sense that the matter field has spatially compact support and is embedded in an exterior vacuum solution

INCL Intra-Nuclear Cascade and ABLA De-excitation Models in GEANT4

peer reviewe

Geometrical Hyperbolic Systems for General Relativity and Gauge Theories

The evolution equations of Einstein's theory and of Maxwell's theory---the latter used as a simple model to illustrate the former--- are written in gauge covariant first order symmetric hyperbolic form with only physically natural characteristic directions and speeds for the dynamical variables. Quantities representing gauge degrees of freedom [the spatial shift vector $\beta^{i}(t,x^{j})$ and the spatial scalar potential $\phi(t,x^{j})$, respectively] are not among the dynamical variables: the gauge and the physical quantities in the evolution equations are effectively decoupled. For example, the gauge quantities could be obtained as functions of $(t,x^{j})$ from subsidiary equations that are not part of the evolution equations. Propagation of certain (``radiative'') dynamical variables along the physical light cone is gauge invariant while the remaining dynamical variables are dragged along the axes orthogonal to the spacelike time slices by the propagating variables. We obtain these results by $(1)$ taking a further time derivative of the equation of motion of the canonical momentum, and $(2)$ adding a covariant spatial derivative of the momentum constraints of general relativity (Lagrange multiplier $\beta^{i}$) or of the Gauss's law constraint of electromagnetism (Lagrange multiplier $\phi$). General relativity also requires a harmonic time slicing condition or a specific generalization of it that brings in the Hamiltonian constraint when we pass to first order symmetric form. The dynamically propagating gravity fields straightforwardly determine the ``electric'' or ``tidal'' parts of the Riemann tensor.Comment: 24 pages, latex, no figure

A Note on Non-compact Cauchy surface

It is shown that if a space-time has non-compact Cauchy surface, then its topological, differentiable, and causal structure are completely determined by a class of compact subsets of its Cauchy surface. Since causal structure determines its topological, differentiable, and conformal structure of space-time, this gives a natural way to encode the corresponding structures into its Cauchy surface