Teaching Is My Art Now

This arts-informed inquiry is grounded in the lived experiences of five self-proclaimed artists including the researcher, who have turned to careers in teaching at varying stages of their lives. The stories of their transitions and evolving identities as both artists and teachers provide the investigative focus for this study. Although this research is relevant to teachers more generally, it specifically focuses on those who have chosen to teach Visual Arts. Particularly suited to a postmodern, arts-informed inquiry, the diverse forms of knowing that create our everyday experiences are acknowledged. The researcher became the bricoleur who collaged the individual stories of the first year artist-teachers into an integrated work of art. This constructivist approach included the use of visual imagery to transcend linguistic description. Through artworks, photographs, a self-narrative and novelette, the multiple ways these early career Visual Arts teachers came to understand themselves and their journeys are explored. This study has the potential to inform novice teachers of the transitions they may experience as they enter the teaching profession. Possible challenges, including the recognition that idealised beliefs might be traded in for more realistic representations, are discussed along with the notions of teaching as an art and the concept of resilience

Agro-Exports and the Rural Resource Poor in Latin America: Policy Options for Achieving Broadly Based Growth

Concentrating on fundamental sector-level impacts that shape the nature of agro-export growth, this paper indicates how intrahousehold impacts fit into the analysis. Section 1 is introductory. Section 2 puts forward the conceptual framework needed to understand sectoral impacts of agro-export growth on the rural resource poor, impacts that can be divided into a small-farm adoption effect, a land-access effect, and a labor-absorption effect, all of which are interlinked. Section 3 explores the economic forces that shape the magnitude of the direct (adoption and land access) and indirect (labor absorption) effects of agro-export growth. Its chief message is that the agronomic and economic characteristics of agro-export crops interact with the intrinsic imperfections of rural factor markets to create farm-size biases-biases that are frequently tilted against small farm production. Section 4 summarizes the coordinated empirical, farm-level research on agro-export booms in Chile, Guatemala, and Paraguay. Section 5 analyzes the range of policy available to foment broadly based growth. In order of increasing policy activism, policies are divided into those that (1) get prices and institutions "right," (2) pick winners for public investment, (3) reform land markets, and (4) reform information-constrained markets. Section 5 argues that capital and insurance market reforms will almost always be necessary if agro-export growth is to be broadly based. Section 6 closes the paper with a brief reflection on the desirability of promoting broadly based growth: Is pursuit of broadly based growth worth it given the likely complexity of the recommended factor market interventions? While this is a highly complex and value-laden question, section 6 suggests perspectives from both the U.S. domestic and low-income country policy contexts that make broadly based growth a goal worth pursuing.Community/Rural/Urban Development, International Relations/Trade,

Salmonella typhimurium Persists within Macrophages in the Mesenteric Lymph Nodes of Chronically Infected Nramp1+/+ Mice and Can Be Reactivated by IFNγ Neutralization

Host-adapted strains of Salmonella are capable of establishing a persistent infection in their host often in the absence of clinical disease. The mouse model of Salmonella infection has primarily been used as a model for the acute systemic disease. Therefore, the sites of long-term S. typhimurium persistence in the mouse are not known nor are the mechanisms of persistent infection clearly understood. Here, we show that S. typhimurium can persist for as long as 1 yr in the mesenteric lymph nodes (MLNs) of 129sv Nramp1+/+ (Slc11a1+/+) mice despite the presence of high levels of anti–S. typhimurium antibody. Tissues from 129sv mice colonized for 60 d contain numerous inflammatory foci and lesions with features resembling S. typhi granulomas. Tissues from mice infected for 365 d have very few organized inflammatory lesions, but the bacteria continue to persist within macrophages in the MLN and the animals generally remain disease-free. Finally, chronically infected mice treated with an interferon-γ neutralizing antibody exhibited symptoms of acute systemic infection, with evidence of high levels of bacterial replication in most tissues and high levels of fecal shedding. Thus, interferon-γ, which may affect the level of macrophage activation, plays an essential role in the control of the persistent S. typhimurium infection in mice

A second look at the toric h-polynomial of a cubical complex

We provide an explicit formula for the toric $h$-contribution of each cubical shelling component, and a new combinatorial model to prove Clara Chan's result on the non-negativity of these contributions. Our model allows for a variant of the Gessel-Shapiro result on the $g$-polynomial of the cubical lattice, this variant may be shown by simple inclusion-exclusion. We establish an isomorphism between our model and Chan's model and provide a reinterpretation in terms of noncrossing partitions. By discovering another variant of the Gessel-Shapiro result in the work of Denise and Simion, we find evidence that the toric $h$-polynomials of cubes are related to the Morgan-Voyce polynomials via Viennot's combinatorial theory of orthogonal polynomials.Comment: Minor correction

La eficacia de la enseñanza superior en línea en América Latina: una revisión sistemática

El objetivo de este trabajo es realizar una revisión sistemática y metanálisis que resuman las publicaciones en español e inglés en la que se compara el rendimiento académico de estudiantes universitarios latinoamericanos en entornos no presenciales y presenciales. La investigación se enfoca en las tendencias, diferencias de media, y en la discusión de resultados. Incluye artículos revisados por pares de 2005 a 2020 disponibles en las bases de datos de EBSCO/ SciELO/ HAPI/ WOS/ Scopus, de diseño experimental o cuasiexperimental, que analizan la eficacia con estudios de caso. Se excluyeron artículos que incorporan estudios en países latinoamericanos de habla no hispana, que abarcan la enseñanza K-12/postgrado, y que enfocan exclusivamente en satisfacción y factores cualitativos. Los 35 artículos finales analizan cursos basados principalmente en pedagogía híbrida aplicada a una sección experimental. Tras excluir las observaciones del valor agregado, se sintetizan los resultados de 30 hallazgos por medio de tablas descriptivas y diagramas de bosque y embudo. En la mayoría de los casos, los componentes no presenciales no causan efectos negativos en los alumnos de un curso determinado; los resultados aumentan significativamente en el 57% de los casos, y todo ello utilizándose una muestra superior a 10.000 observaciones procedentes de los alumnos. Los tamaños del efecto intermedios a partir de las innovaciones digitales representan un índice superior a 0,60 (intervalos [-0,13-1,470]), más alto cuando el rendimiento académico constituye el hallazgo. Limitaciones en la investigación se deben a escasa información demográfica en torno al alumno, clasificaciones confusas de las secciones, y tamaños de muestra insuficientes, lo que sugiere cautela en la interpretación de los resultados

Host Restriction Phenotypes of \u3cem\u3eSalmonella typhi\u3c/em\u3e and \u3cem\u3eSalmonella gallinarum\u3c/em\u3e

Salmonella typhi and Salmonella gallinarum phenotypes correlated with mouse host restriction have been identified by using in vitro and in vivo systems. S. typhi is capable of entering the murine intestinal epithelium via M cells, as is Salmonella typhimurium, which causes systemic infection in the mouse. But, unlike S. typhimurium, S. typhi does not destroy the epithelium and is cleared from the Peyer’s patches soon after M-cell entry. S. gallinarum appears to be incapable of entering the murine Peyer’s patch epithelium. Our in vitro evidence suggests that S. gallinarum is taken up in murine phagocytic cells by a mechanism different from that of S. typhimurium. S. typhimurium is taken up at a higher frequency and is maintained at higher viable counts throughout a 24-h time course in a murine macrophage-like cell line than are S. gallinarum and S. typhi