Donna C. Roper, 1947–2015

PaleoAmerican Ethnic Diversity by Billy Roper

Completing the Picture of the Roper Resonance.

We employ a continuum approach to the three valence-quark bound-state problem in relativistic quantum field theory to predict a range of properties of the proton's radial excitation and thereby unify them with those of numerous other hadrons. Our analysis indicates that the nucleon's first radial excitation is the Roper resonance. It consists of a core of three dressed quarks, which expresses i...

The Roper-Day total shoulder replacement.

A simple unconstrained shoulder prosthesis has been used in 22 patients (25 shoulders) with incapacitating pain and severely damaged joints who, because of age or generalised rheumatoid disease, have limited functional requirements. All reported good and lasting pain relief. Improvement in range of movement was modest, but there was marked improvement in function. In this group of patients, rot...

The vowel inventory of Roper Kriol

Despite being the largest Indigenous Australian language, Kriol—an English-lexified creole spoken across the northern part of Australia—is still largely unexamined from an instrumental or phonological point of view. This hampers efforts to predict crosslinguistic difficulties experienced by Kriol speakers in English-language settings and crucially in predicting the difficulties that Kriol-speak...

Roper Resonance in a Quark-diquark Model

We discuss a new description for the Roper resonance, the first nucleon excited state of JP = 1/2+, in a model of strong diquark correlations. Treating the scalarisoscalar and axial-vector–isovector diquarks as independent degrees of freedom, two states having nucleon quantum numbers are constructed. Due to the scalar and axial-vector nature of the diquarks, the two nucleon states have differen...