Interacting Electrons on a Square Fermi Surface

Electronic states near a square Fermi surface are mapped onto quantum chains. Using boson-fermion duality on the chains, the bosonic part of the interaction is isolated and diagonalized. These interactions destroy Fermi liquid behavior. Non-boson interactions are also generated by this mapping, and give rise to a new perturbation theory about the boson problem. A case with strong repulsions between parallel faces is studied and solved. There is spin-charge separation and the square Fermi surface remains square under doping. At half-filling, there is a charge gap and insulating behavior together with gapless spin excitations. This mapping appears to be a general tool for understanding the properties of interacting electrons on a square Fermi surface.Comment: 25 pages, Nordita preprint 94/22

A Third-order and a Fourth-order Iteration Process for Nonlinear Equations

Convergence proof and procedure for third-order and fourth-order iteration process for nonlinear equations - Newton-Raphson second-order iteratio

Written Thoughts, WAPA I: Camp Fire Girls and the New Relation of Women to the World

Reprints of an address delivered by Dr. Luther H. Gulick before the National Education Association, July, 1912, and the Connecticut Valley Public Recreation Conference in Springfield, Massachusetts, April, 1912. Digitized from Box 1, folder 12, Camping in Maine Collection, MS 83

Written Thoughts, WAPA 2: The Desires of American Girls

An essay written by Luther H. Gulick circa 1913. Digitized from Box 1, folder 12, Camping in Maine Collection, MS 83

Written Thoughts, WAPA 3: Aims and Policy

Essays written by Luther H. Gulick including Camp Fire is an Army, not a Hospital; Patriotism and the Camp Fire Girls; and Team Work in Social Life, an Address to the Girls of America. Digitized from Box 1, folder 12, Camping in Maine Collection, MS 83

Coping and Social Support for Parents of Children with Autism

The increased incidence of autism in children impacts families, educators, and health professionals. A descriptive survey design was used to obtain responses from parents of autistic children in public schools. Data collection instruments included The Social Support Index, SSI (McCubbin, Patterson, and Glynn, 1982), and The Family Crisis Oriented Personal Evaluation Scale, F-COPES (McCubbin, Olson, and Larsen, 1981 ). The majority of parents of autistic children perceived that they had support within their families and communities. One half of the families identified serious stressors in addition to autism. Acquiring social support and reframing were the coping strategies used most frequently. The school nurse is in a position to provide support to parents of children with autism and special needs, and integrate coping and social support assessments into practice

Evaluation of the Constant Momentum Mass Spectrometer for Ionospheric Investigations

Constant momentum mass spectrometer for ionospheric sounding