Two-flavor condensates in chiral dynamics: temperature and isospin density effects

Isospin density and thermal corrections for several condensates are discussed, at the one-loop level, in the frame of chiral dynamics with pionic degrees of freedom. The evolution of such objects give an additional insight into the condensed-pion phase transition, that occurs basically when |\mui|>m_\pi, being |\mui| the isospin chemical potential. Calculations are done in both phases, showing a good agreement with lattice results for such condensates.Comment: 9 pages, 10 figure

Induced Bremsstrahlung by light in graphene

We study the generation of an electromagnetic current in monolayer graphene immersed in a weak perpendicular magnetic field and radiated with linearly polarized monochromatic light. Such a current emits Bremsstrahlung radiation with the same amplitude above and below the plane of the sample, in the latter case consistent with the small amount of light absorption in the material. This mechanism could be an important contribution for the reflexion of light phenomenon in graphene.Comment: 3 pages, 1 figure. To appear in Revista Mexicana de Fisic

Early Exposure to and Preparation for College: A Guide for Educators

Since 2012, the NYC Department of Education's Expanded Success Initiative (ESI) has provided funding and professional development to 40 City high schools with the goal of helping them develop new strategies (or expand existing efforts) aimed at increasing college and career readiness for Black and Latino male students. As part of our larger evaluation of ESI, the Research Alliance is conducting in-depth case studies in five ESI schools, observing programs in action, and speaking with educators, school leaders, and students about the specific practices they have changed as part of ESI. Drawing on these sources, we have compiled a set of guides that provide concrete examples of how ESI schools are attempting to boost college readiness for young men of color. Each guide describes a specific approach and offers tips, discussion questions, and resources for educators who may want to pursue this strategy. This practice guides focuses on Early Exposure to and Preparation for College, a topic that principals, teachers, and guidance counselors across ESI schools identified as important for creating an environment that supports and welcomes young men of color. Helping students envision themselves in college;Supporting the college search and application processes;Providing access to college coursework and career training; andIncreasing opportunities and supports in math

Creating Supportive Bonds of Brotherhood: A Guide for Educators

Research suggests that strong relationships between teachers and students—and between students and their peers—contribute to academic success. The schools highlighted in this guide offer male-only programs designed to build such relationships and promote a sense of brotherhood and camaraderie through:Rituals and ceremonies;Conversations about personal experiences and challenges; andPeer mentorship.

Shadowable Points for flows

A shadowable point for a flow is a point where the shadowing lemma holds for pseudo-orbits passing through it. We prove that this concept satisfies the following properties: the set of shadowable points is invariant and a $G_{\delta}$ set. A flow has the pseudo-orbit tracing property if and only if every point is shadowable. The chain recurrent and nonwandering sets coincide when every chain recurrent point is shadowable. The chain recurrent points which are shadowable are exactly those that can be are approximated by periodic points when the flow is expansive. We study the relations between shadowable points of a homeomorphism and the shadowable points of its suspension flow. We characterize the set of forward shadowable points for transitive flows and chain transitive flows. We prove that the geometric Lorenz attractor does not have shadowable points. We show that in the presence of shadowable points chain transitive flows are transitive and that transitivity is a necessary condition for chain recurrent flows with shadowable points whenever the phase space is connected. Finally, as an application these results we give concise proofs of some well known theorems establishing that flows with POTP admitting some kind of recurrence are minimal. These results extends those presented in [10].Comment: 18 page

Music Among Friends

Program listing performers and works performe