From A Service-Learning to A Social-Change Model

Tutor education courses that prepare students to serve as peer writing consultants often include service learning; a typical servicelearning tutor education course involves sending students to tutor in local schools, usually in underserved neighborhoods. Existing writing center scholarship on service learning tends to overlook the limitations of this model. This article advances a radically different approach for tutor education where the course acts as an incubator for social change on campus. Informed by the principles advanced by the critical service learning movement, the course described here invites students to design and implement campus-based community building projects. Ultimately, this article demonstrates that a course focused on community building, rather than tutoring theory and strategies, can effectively prepare students to serve as peer writing consultants while imparting a heightened awareness of social inequities and a deep investment in the campus community.University Writing Cente

Corrections, clarifications, and additions to the 1996 checklist of the Alticinae of Central America : including Mexico (Coleoptera: Chrysomelidae)

In our checklist of the Alticinae of Central America and Mexico (Furth and Savini, 1996), there were some species whose status or generic combination needs clarification. In preparing the 1996 checklist the authors referred to some unpublished notes of Jan Bechyne in order to understand his system of alticine names and to clarify to which genera he considered various species to belong

Pseudo Goldstone Bosons Phenomenology in Minimal Walking Technicolor

We construct the non-linear realized Lagrangian for the Goldstone Bosons associated to the breaking pattern of SU(4) to SO(4). This pattern is expected to occur in any Technicolor extension of the standard model featuring two Dirac fermions transforming according to real representations of the underlying gauge group. We concentrate on the Minimal Walking Technicolor quantum number assignments with respect to the standard model symmetries. We demonstrate that for, any choice of the quantum numbers, consistent with gauge and Witten anomalies the spectrum of the pseudo Goldstone Bosons contains electrically doubly charged states which can be discovered at the Large Hadron Collider.Comment: 25 pages, 5 figure

Una finestra su: Amsterdam

Amsterdam è in una fase di delicata transizione. L’articolo propone e affronta una lettura critica di quattro temi chiave: la diversificazione della struttura demografica e socio-economica, la liberalizzazione della politica abitativa, l’approccio organico dello sviluppo urbano e la governance metropolitana. Oggi la città di Amsterdam è più etnicamente e socialmente frammentata che mai. La geografia sociale mostra una crescente diversificazione tra centro e periferia che sottolinea importanti asimmetrie economiche e culturali. Stanno avvenendo anche cambiamenti nella tradizione degli interventi su larga scala e della pianificazione pubblica: in tempi di austerità, gli interventi urbani sono infatti prevalentemente su piccola scala ed orientati a stimolare imprenditorialità in determinate aree urbane e spesso legate a sperimentazioni ed ‘economie creative’. Infine alla base di questi trends si configura un nuovo panorama politico composto da partiti liberali e progressisti, che sfidano gli equilibri politici della città-regione

Free monadic Tarski and MMI3-algebras

MMI3-algebras are a generalization of the monadic Tarski algebras as defined by A. Monteiro and L. Iturrioz, and a particular case of the MMIn+1-algebras defined by A. Figallo. They can also be seen as monadic three-valued £ukasiewicz algebras without a first element. By using this point of view, and the free monadic extensions, we construct the free MMI3-algebras on a finite number of generators, and indicate the coordinates of the generators. As a byproduct, we also obtain a construction of the free monadic Tarski algebras.Fil: Entizne, Rosana V.. Universidad Nacional del Sur. Departamento de Matemática; ArgentinaFil: Monteiro, Luiz F.. Universidad Nacional del Sur. Departamento de Matemática; ArgentinaFil: Savini, Sonia M.. Universidad Nacional del Sur. Departamento de Matemática; ArgentinaFil: Viglizzo, Ignacio Dario. Universidad Nacional del Sur. Departamento de Matemática; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentin

First Principles Simulations of Boron Diffusion in Graphite

Boron strongly modifies electronic and diffusion properties of graphite. We report the first ab initio study of boron interaction with the point defects in graphite, which includes structures, thermodynamics, and diffusion. A number of possible diffusion mechanisms of boron in graphite are suggested. We conclude that boron diffuses in graphite by a kick-out mechanism. This mechanism explains the common activation energy, but large magnitude difference, for the rate of boron diffusion parallel and perpendicular to the basal plane. © 2007 The American Physical Society