Do synthesis centers synthesize? A semantic analysis of topical diversity in research.

Synthesis centers are a form of scientific organization that catalyzes and supports research that integrates diverse theories, methods and data across spatial or temporal scales to increase the generality, parsimony, applicability, or empirical soundness of scientific explanations. Synthesis working groups are a distinctive form of scientific collaboration that produce consequential, high-impact publications. But no one has asked if synthesis working groups synthesize: are their publications substantially more diverse than others, and if so, in what ways and with what effect? We investigate these questions by using Latent Dirichlet Analysis to compare the topical diversity of papers published by synthesis center collaborations with that of papers in a reference corpus. Topical diversity was operationalized and measured in several ways, both to reflect aggregate diversity and to emphasize particular aspects of diversity (such as variety, evenness, and balance). Synthesis center publications have greater topical variety and evenness, but less disparity, than do papers in the reference corpus. The influence of synthesis center origins on aspects of diversity is only partly mediated by the size and heterogeneity of collaborations: when taking into account the numbers of authors, distinct institutions, and references, synthesis center origins retain a significant direct effect on diversity measures. Controlling for the size and heterogeneity of collaborative groups, synthesis center origins and diversity measures significantly influence the visibility of publications, as indicated by citation measures. We conclude by suggesting social processes within collaborations that might account for the observed effects, by inviting further exploration of what this novel textual analysis approach might reveal about interdisciplinary research, and by offering some practical implications of our results.

Containing COVID-19 and the social costs on human rights in African countries.

Multiple social interventions were introduced to contain the COVID-19 pandemic across Africa, limiting social engagement, school and workplace attendance, and travel. In anticipation of negative economic consequences and social impact, many governments introduced cash transfers, social pensions, food aid, and utility and tax waivers. However, people living precariously and/or under conditions of structural vulnerability were often unable to access to this support. A rapid review was undertaken on COVID-19 and the effects of interventions on human rights in African countries, examining primary studies, editorial notes, opinion papers, and literature reviews, with focus on qualitative approaches and discussions. In examining the links between health, human rights and non-pharmaceutical interventions on vulnerable populations, the review identified that: (1) people who were vulnerable were excluded from or not adequately represented in policy responses to COVID-19; (2) the precarious socio-economic conditions of these populations were not adequately addressed by dominant policy responses; and (3) only partial support was offered to those whose relationship with the state was ambiguous or conditional, so compromising human rights. Interactions between health, human rights, and underlying social and economic conditions amplified poor health and impoverishment of those who were already vulnerable. The challenge is to find a balance between stopping the spread of COVID-19 and the protection of human rights; to implement population-specific responses to supplement uniform public health responses; and to address causes (structural vulnerability) rather than symptoms. There is a need to plan rather than react to pandemics, and to co-construct interventions with rather than delivering instructions to populations. These recommendations serve as instruments to be considered when designing new policies, to incorporate a human rights perspective in responses to current and future pandemics.

Aplicación del análisis de isótopos de estroncio en la identificación humana en Colombia / Application of strontium isotope analysis for human identification in Colombia

El artículo presenta una revisión de las investigaciones realizadas a la fecha en Colombia relacionadas con la aplicación de los análisis de isótopos en la identificación humana. En especial, hace énfasis en la utilidad de las relaciones isotópicas de estroncio (87Sr/86Sr) para rastrear el lugar de origen de un cuerpo en condición no identificada (CNI). Dentro de la revisión se resalta la importancia de la variabilidad geológica colombiana, la cual puede incidir en la diversidad del estroncio biodisponible, en un espacio y un periodo determinados. Esta diversidad del estroncio biodisponible puede verse reflejada en la distribución espacial de la composición isotópica de estroncio en diferentes tejidos humanos (dientes, huesos, cabello y uñas) de los pobladores del territorio colombiano. Esto es debido a la transferencia de la señal isotópica del estroncio biodisponible a los tejidos humanos. Dentro de las conclusiones de la revisión bibliográfica realizada se menciona la importancia del uso del estroncio (Sr) en la identificación humana en el contexto colombiano, su aplicación forense y sus posibles limitantes respecto al uso de esta metodología en el país.