12 research outputs found
Intersection form, laminations and currents on free groups
Let be a free group of rank , let be a geodesic current
on and let be an -tree with a very small isometric action
of . We prove that the geometric intersection number is equal
to zero if and only if the support of is contained in the dual algebraic
lamination of . Applying this result, we obtain a generalization of
a theorem of Francaviglia regarding length spectrum compactness for currents
with full support. As another application, we define the notion of a
\emph{filling} element in and prove that filling elements are "nearly
generic" in . We also apply our results to the notion of \emph{bounded
translation equivalence} in free groups.Comment: revised version, to appear in GAF
The use of local orbitals in multireference calculations
CAS-SCF-type algorithms based on molecular orbitals that preserve their physical nature during the iterative process have been proposed recently by our groups. Our approach is based on the iterative partial diagonalization of the one-body reduced density matrix. If localized guess orbitals are used, the locality property is kept by the final orbitals. The use of local orbitals in multiference calculations has several advantages. It can be used to reduce the number of active orbitals in CAS-SCF calculations on large systems, and in general to have a better control on the physical nature of the active space. The reduction from a complete to a selected reference space is also possible in the case of configuration interaction calculations. The technique is illustrated through applications to the description of bond breaking and n->pi* excited states in conjugated systems. The efficiency of selection of local excitations is shown on a magnetic complex
Communication patterns between nursing staff and the ethnic elderly in a long-term care facility
Developing Cultural Self-Awareness: The First Step in Values Clarification for Early Interventionists
This article presents a discussion of the need for early interventionists to develop awareness of certain cultural assumptions underlying their practice. A wide range of literature on cultural differences is used to identify five areas of potential dissonance between professionals and families from culturally diverse backgrounds: interpretations of the meaning of disability; concepts of family structure and identity; goals of education; parent-child interaction, and communication style. It is argued that awareness of one's own cultural beliefs in these areas is an essential first step in developing effective collaboration with culturally different families