Lois Anne Dollard and Dorothy Brunson Jan. 7, 1947

Lois Anne Dollard and Dorothy Brunson of Sumter were contributors to the winter edition of The Journal, Winthrop College\u27s literary publication. Miss Dollard wrote a poem and an essay, and Miss Brunson published a sonnet

High-Velocity Estimates and Inverse Scattering for Quantum N-Body Systems with Stark Effect

In an N-body quantum system with a constant electric field, by inverse scattering, we uniquely reconstruct pair potentials, belonging to the optimal class of short-range potentials and long-range potentials, from the high-velocity limit of the Dollard scattering operator. We give a reconstruction formula with an error term.Comment: In this published version we have added remarks and we have edited the pape

Dynamics of Dollard asymptotic variables. Asymptotic fields in Coulomb scattering

Generalizing Dollard's strategy, we investigate the structure of the scattering theory associated to any large time reference dynamics $U_D(t)$ allowing for the existence of M{\o}ller operators. We show that (for each scattering channel) $U_D(t)$ uniquely identifies, for $t \to \pm \infty$, {\em asymptotic dynamics} $U_\pm(t)$; they are unitary {\em groups} acting on the scattering spaces, satisfy the M{\o}ller interpolation formulas and are interpolated by the $S$-matrix. In view of the application to field theory models, we extend the result to the adiabatic procedure. In the Heisenberg picture, asymptotic variables are obtained as LSZ-like limits of Heisenberg variables; their time evolution is induced by $U_\pm(t)$, which replace the usual free asymptotic dynamics. On the asymptotic states, (for each channel) the Hamiltonian can by written in terms of the asymptotic variables as $H = H_\pm (q_{out/in}, p_{out/in})$, $H_\pm (q,p)$ the generator of the asymptotic dynamics. As an application, we obtain the asymptotic fields $\psi_{out/in}$ in repulsive Coulomb scattering by an LSZ modified formula; in this case, $U_\pm(t)= U_0(t)$, so that $\psi_{out/in}$ are \emph{free} canonical fields and $H = H_0(\psi_{out/in})$.Comment: 34 pages, with minor improvements in the text and correction of misprint

El desarrollo social del niño

Se consideran tres factores que intervienen en el desarrollo social del niño: aprendizaje social, normatividad ético-social y relaciones interpersonales (familia, escuela y grupo de iguales). El aprendizaje social es estudiado según el modelo conductista (Bandura /Walters, Miller/Dollard), y en la atención a las normas se tiene en cuenta el esquema de desarrollo propuesto por Piaget.On considerère 3 facteurs qui interviennent dans le développement social de l'enfant: apprentissage social, normativité éthico-sociale et relations interpersonelles (famille, école et groupe de gens de la même condition). L'apprentissage social est étudié selon le modkle watsonien (Bandura /Walters, Miller /Dollard), et dans l'attention aux normes, on tient compte du schéma de développement proposé par Piaget.Three factors which contribute to the social development of a child are considered: social learning, socioethical norms and interpersonal relationships (family, school and peer groups). Social learning is studied according to the behaviourist model (Bandura/Walters, Miller/Dollard), and as regards norms, the developmental theory proposed by Piaget is taken into account

El desarrollo social del niño

Se consideran tres factores que intervienen en el desarrollo social del niño: aprendizaje social, normatividad ético-social y relaciones interpersonales (familia, escuela y grupo de iguales). El aprendizaje social es estudiado según el modelo conductista (Bandura /Walters, Miller/Dollard), y en la atención a las normas se tiene en cuenta el esquema de desarrollo propuesto por Piaget.On considerère 3 facteurs qui interviennent dans le développement social de l'enfant: apprentissage social, normativité éthico-sociale et relations interpersonelles (famille, école et groupe de gens de la même condition). L'apprentissage social est étudié selon le modkle watsonien (Bandura /Walters, Miller /Dollard), et dans l'attention aux normes, on tient compte du schéma de développement proposé par Piaget.Three factors which contribute to the social development of a child are considered: social learning, socioethical norms and interpersonal relationships (family, school and peer groups). Social learning is studied according to the behaviourist model (Bandura/Walters, Miller/Dollard), and as regards norms, the developmental theory proposed by Piaget is taken into account

Stable carbon and radiocarbon isotope compositions of particle size fractions to determine origins of sedimentary organic matter in an estuary

Stable and radioactive carbon isotopic compositions of particle size fractions of a surface sediment from the Ems-Dollard estuary vary considerably with particle size. The organic material in the fine fractions (<20 µm) has considerably higher 14C values (14a~80%) than that in the coarse fractions (52%) and has higher δ13C values (average of -23‰ and -25.6‰, respectively). This shows that OM in the fine and the coarse fractions has different sources. The organic carbon in the fractions with particle sizes <20 µm is mainly imported from the North Sea. The contribution of material from the Ems river appears negligible. The carbon isotopic composition of the coarse fractions points to a terrestrial contribution. Discrete organic fragments are found of both terrestrial and marine/estuarine origin.