Eigenvalues of Toeplitz minimal systems of finite topological rank

In this article we characterize measure theoretical eigenvalues of Toeplitz Bratteli-Vershik minimal systems of finite topological rank which are not associated to a continuous eigenfunction. Several examples are provided to illustrate the different situations that can occur

Southern occupational therapies: Emerging identities, epistemologies and practices

Indexación: Web of Science; Scielo.For over a decade, debates in occupational therapy have extended into the profession's theoretical foundations as well as epistemological underpinnings thereof A series of proposals have emerged from around the world that aim to link the definition of occupational therapy, its knowledge and practices to contemporary social, political, cultural and economic conditions. Contributing to this is the increasing precariousness of the global social life, the economic crises of many social systems, and the deterioration of the ecological environment. The current paper critically reflects on the historical conditions that shape the institution of occupational therapy, particularly in the regions of South America and Africa. This involves a political, ethical, and epistemological rethinking of the foundations that underpin identities, knowledge and practices of occupational therapy and their effects on society. These foundations may favour processes of exclusion and ahistorical and individualist views of human occupation, as opposed to social perspectives expressed in collective occupations and human rights promoting practices. The authors propose to problematise the construction of a professional identity, knowledge and practices of occupational therapy, emphasising the need for a liberating discipline, committed to and acting alongside people and communities who are in situations of social exclusion. This implies the necessary positioning of occupational therapy within social transformation.http://ref.scielo.org/z57kz

Probing additional dimensions in the universe with neutron experiments

We carry out a simple analysis of (n+3)-dimensional gravity in the context of recent work on 'large' supplementary dimensions and deduce a formula for the expected compactification radius for the n additional dimensions in the universe, as a function of the Planck and the electro-weak scales. We argue that the correspondingly modified gravitational force gives rise to effects that might be within the detection range of dedicated neutron experiments. A scattering analysis of the corresponding modified gravitational forces suggests that slow neutron scattering off atomic nuclei with null spin may provide an experimental test for these ideas.Comment: A revised version suggesting a specific neutron-scattering experiment. Physics Letters B, accepted for publicatio

Exploring the Racial and Gender Identity Formation of Men of Color in Student Leader Roles who have white Women Supervisors and Advisors in Higher Education

Daily experiences of isolation and invalidation create adverse campus climates that often lead to men of color dropping out of higher education. Student leadership positions can increase feelings of belonging, provide greater access to campus resources and increase retention for men of color, particularly when they centralize identity exploration. White women are overrepresented in student affairs direct student contact positions in higher education and are likely to supervise and/or advise men of color student leaders, but many student affairs professional are not properly trained to supervise or advise through an identity-based framework. This study explored: how do men of color make sense of their racial and gender identity formation during their undergraduate experiences in student leadership settings? and how do men of color describe their experiences of racial and gender identity formation while being supervised and/or advised by white women student affair professionals? It blended elements of Constructivist Grounded Theory with a Participatory Action Research approach to create a new methodology: Co-Constructivist Grounded Theory. Three co-researchers collectivity interviewed eight racially and ethnically diverse participants who attend a variety of four-year institutions. The co-researchers used memo writing, axial coding, thematic coding, and co-researcher meetings to develop the Ecological Resiliency Model for Men of Color Student Leaders. The ecological model illustrates that the supervisory/advisor relationships between men of color student leaders and their white women supervisors are best understood when they are situated within the institutional climate and the student leadership microclimates where the men of color are engaged. They experience specific types of interactions within each climate and relationship that have positive and negative impacts on their experiences. Men of color learn to respond to their different climates by shifting their energy between focusing on healthy identity growth within positive environments and employing resiliency strategies to navigate and survive within negative environments. Race was the most salient identity for all of the participants in the steady. The men who had nurturing environments where they could heal from institutional racism were more able to explore their masculine identity and understand their privilege as men