Diagnóstico molecular de Norovirus y Astrovirus en conejos de la zona sur oriente del Estado de México

Astrovirus y Norovirus son uno de los principales agentes etiológicos de origen vírico causal de diarrea en las diversas especies. En conejos su estudio ha sido sumamente limitado, y sólo se ha identificado en animales de Italia, Estados Unidos y Norovirus no se ha reportado en esta especie. En México no existen reportes de la presencia de Astrovirus en esta especie, por tal motivo el objetivo de este estudio fue identificar ambos virus empleando la técnica de RT-PCR, mediante la amplificación parcial de sus marcos de lectura abiertos. Lo que permitirá ser considerado en el diagnóstico de enfermedades entéricas.UAEM Becaria CoNACy

ASSOCIATIONS AMONG SEXUAL VICTIMIZATION EXPERIENCES, COPING STRATEGIES, AND PSYCHOPATHOLOGY IN HETEROSEXUAL AND SEXUAL MINORITY WOMEN

This study examined the associations among sexual minority status, adult sexual victimization, childhood experiences of abuse and neglect, coping strategies, and psychopathology in womens sexual assault experiences. One hundred and seventy-seven women (n = 177) were recruited via the Internet to complete an online study asking them about their most distressing/severe sexual victimization experience. Non-parametric tests were used to examine associations among the variables. There were significant associations between sexual minority status and both victimization severity and sexual revictimization, with sexual minority status being associated with higher levels of victimization severity and a higher likelihood of being revictimized. There were no statistically significant differences between sexual minority and heterosexual women in terms of contextual features of their most distressing/severe sexual victimization experience and the contextual features of their post-assault experience. Additionally, there were no differences between the groups with respect to childhood abuse and neglect, coping strategies, and psychopathology. Nonetheless, sexual victimization is a major public health concern, and findings from this study provided valuable information about sexual minority women\u27s victimization experiences, yet more research needs to be conducted with sexual minority women

Development of working memory and performance in arithmetic: a longitudinal study with children

Introducción. Este estudio ha tenido por objetivo investigar la relación entre el desarrollo de la memoria de trabajo y el desempeño en actividades aritméticas. Método. Se realizó un estudio longitudinal con una muestra de 90 niños, a los que se evaluó durante tres años consecutivos (i.e., primero, segundo y tercer año de escuela primaria) respecto al desempeño en cada componente de la MT (i.e., (i) bucle fonológico, (ii) agenda visoespacial y (iii) ejecutivo central y a su conocimiento en cálculo aritmético. Resultados. Los resultados indican relación entre el desarrollo progresivo de la capacidad de memoria de trabajo y los desempeños en aritmética a través del tiempo. Evidencia de ello es que el grupo con mayor desempeño en memoria de trabajo obtiene mejores puntajes en cálculo, durante los tres años de estudio. Discusión y Conclusiones. La discrepancia en las punctuaciones en cálculo se incrementa según pasan los años debido a la incidencia que tiene la memoria de trabajo en las estrategias utilizadas para la resolución de problemas aritméticos.This study has aimed to investigate the relationship between the development of working memory and performance on arithmetic activities. Method. We conducted a 3-year longitudinal study of a sample of 90 children, that was fol-lowed during the first, second and third year of primary school. All children were tested on measures of WM components (i. e., (i) phonological loop, (ii) visuospatial sketchpad and (iii) central executive) and arithmetic. Results. Results indicate the relationship between the progressive development of working memory capacity and performance in arithmetic through time. Evidence of this is that the group with higher working memory performance gets better scores in calculus, during the three years of study. Discussion and Conclusion. The discrepancy in scores in calculation increases as the years because of the impact it has on working memory strategies used for solving arithmetic problems.Fil: Lopez, Gabriela Magdalena. Ponitifica Universidad Católica Argentina "Santa Maria de los Buenos Aires". Facultad Teresa de Avila; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Centro Interdisciplinario de Investigaciones En Psicología Matemática y Experimental Dr. Horacio J.a Rimoldi. Grupo Vinculado Al Ciipme; Argentin

Age and growth of the highly exploited narrownose smooth-hound (Mustelus schmitti) (Pisces: Elasmobranchii)

The narrownose smoothhound (Mustelus schmitti) is the most exploited elasmobranch of Argentina, Brazil, and Uruguay and is considered endangered (IUCN Red List of Threatened Species). Providing information on age and growth can improve efforts for conservation of this species. Therefore, our objective was to provide accurate estimates of the age structure and growth parameters for narrownose smooth-hound from Anegada Bay, an important shark nursery area in Argentina. In vertebrae of narrownose smooth-hound, we observed a pattern of alternating opaque and translucent bands and a yearly periodicity in the deposition of this pattern. Ages determined from vertebral band counts ranged from 0 to 11 years. Calculated longevity and total natural mortality rates were 20.87 years and 0.19/year for females and 12.24 years and 0.26/year for males, respectively. This species reached a size of approximately 400 mm in total length in the initial year of growth, and the age at first maturity was 7.61 years for females and 6.79 years for males. The slow growth and late age at maturity of the narrownose smoothhound indicate a need for additional conservation measures to rebuild the population and achieve a sustainable fishery in the 3 countries in which it is distributed.Fil: Molina, Juan Manuel. Universidad Nacional del Sur; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Blasina, Gabriela Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Lopez Cazorla, Andrea Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentin

Mathematical literacy: A case study of pre-service teachers

This study addresses the question of whether or not pre-service teachers are ready and prepared to use and teach the highly-specialized language of each discipline. The disciplinary languages present teaching and learning challenges due to their lack of parallels in the daily language (Shanahan & Shanahan, 2008). Additionally, the languages of the disciplines are rarely taught and are commonly acquired through an isolated representation of words without a situated meaning within the theory (Gee, 2002). The knowledge of the particular ways of reading, writing, listening to, and talking in the content areas provides opportunities for students’ apprenticeship within the disciplines required for success in higher education contexts (Dobbs, Ippolito, and Charner, 2017). Moreover, this study addresses the question of how future teachers develop disciplinary knowledge and skills. The purpose of this case study was to investigate how mathematical literacy is shaped and defined by the experiences, language, and disciplinary practices of pre-service teachers and experts in mathematics. This overall aim was unfolded by three guiding research questions: 1) What do the Experiences of Pre-Service Teachers and Experts in Mathematics Reveal about their Understanding of Mathematical Literacy? 2) RQ 2. How do pre-service teachers and experts in mathematics use language when solving mathematical problems? and 3) What literacy practices do pre-service teachers and experts in mathematics utilize when presented with modules that require mathematics problem-solving? To structure the elements of analysis for the participants’ responses, I adopted the theoretical support from the emerging disciplinary literacy framework, the novice-expert paradigm, and the tenets of M. K. Halliday’s functional linguistic theory (i.e., Systemic Functional Linguistics; [SFL]). Four faculty in the Department of Mathematics and four pre-service teachers in the Department of Curriculum and Instruction at a large Midwest university agreed to participate in this case study. For the data collection, I asked the participants to participate in two sessions. In the first sessions, the participants responded to a semi-structured interview. Afterward, in a second session, the participants solved modules of mathematical problems following three protocols: a think-aloud, a silent-solving, and an oral-explanatory. The results of the participants’ responses to the semi-structured interview and the three protocols indicated that their experiences as learners and teachers of mathematics are tied to their definitions of literacy and disciplinary literacy. The SFL analysis showed that for the experts of mathematics, mathematical problem-solving is a more abstract and cognitive practice. The pre-service teachers’ registers indicated that mathematical problem-solving is experienced as more concrete and real practice. The unique literacy practices that these participants displayed showed the strong connection between language, literacy, and mathematical thought.The implications of this study are discussed in terms of the importance of language and disciplinary literacy in preparation for future teachers as they progress in their course of study within their teaching education programs

Lo rural y lo científico: La presencia de la Estación Experimental Regional Agropecuaria (EERA) INTA Bariloche 1962- 1968

En este trabajo se discute el modo en que desde una práctica científica se toma lo rural en la estepa norpatagónica durante la segunda mitad del siglo XX, observando la intervención de estudios científicos asociados a la explotación ovina. Se revisa el rol del INTA y la particular ubicación del Centro Regional en Bariloche. Como resultado destacamos la vinculación de la elección de la locación con la red tecno-científica que se desplegaba en el país, antes que con las necesidades puntuales del espacio rural aledaño. Esto redundó en el sostenimiento de desigualdades sociales en el modelo productivo, afianzado por la incorporación tecnológica que se resuelve desde la agencia científica.Fil: Lopez, Silvana. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Nuñez, Paula Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; Argentin

Improving clustering with metabolic pathway data

Background: It is a common practice in bioinformatics to validate each group returned by a clustering algorithm through manual analysis, according to a-priori biological knowledge. This procedure helps finding functionally related patterns to propose hypotheses for their behavior and the biological processes involved. Therefore, this knowledge is used only as a second step, after data are just clustered according to their expression patterns. Thus, it could be very useful to be able to improve the clustering of biological data by incorporating prior knowledge into the cluster formation itself, in order to enhance the biological value of the clusters. Results: A novel training algorithm for clustering is presented, which evaluates the biological internal connections of the data points while the clusters are being formed. Within this training algorithm, the calculation of distances among data points and neurons centroids includes a new term based on information from well-known metabolic pathways. The standard self-organizing map (SOM) training versus the biologically-inspired SOM (bSOM) training were tested with two real data sets of transcripts and metabolites from Solanum lycopersicum and Arabidopsis thaliana species. Classical data mining validation measures were used to evaluate the clustering solutions obtained by both algorithms. Moreover, a new measure that takes into account the biological connectivity of the clusters was applied. The results of bSOM show important improvements in the convergence and performance for the proposed clustering method in comparison to standard SOM training, in particular, from the application point of view. Conclusions: Analyses of the clusters obtained with bSOM indicate that including biological information during training can certainly increase the biological value of the clusters found with the proposed method. It is worth to highlight that this fact has effectively improved the results, which can simplify their further analysis.Fil: Milone, Diego Humberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional; ArgentinaFil: Stegmayer, Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional; ArgentinaFil: Lopez, Mariana Gabriela. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Kamenetzky, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Biotecnología; ArgentinaFil: Carrari, Fernando Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Biotecnología; Argentin

The Graphicahedron

The paper describes a construction of abstract polytopes from Cayley graphs of symmetric groups. Given any connected graph G with p vertices and q edges, we associate with G a Cayley graph of the symmetric group S_p and then construct a vertex-transitive simple polytope of rank q, called the graphicahedron, whose 1-skeleton (edge graph) is the Cayley graph. The graphicahedron of a graph G is a generalization of the well-known permutahedron; the latter is obtained when the graph is a path. We also discuss symmetry properties of the graphicahedron and determine its structure when G is small.Comment: 21 pages (European Journal of Combinatorics, to appear

Experimental Techniques against RANS Method in a Fully Developed Turbulent Pipe Flow:Evolution of Experimental and Computational Methods for the Study of Turbulence

Fully developed turbulent flow in a pipe was studied by considering experimental and computational methods. The aim of this work was to build on the legacy of the University of Manchester, which is widely regarded as the birthplace of turbulence due to the pioneering work of the prominent academic Professor Osborne Reynolds (1842–1912), by capturing the evolution of fluid turbulence analysis tools over the last 100 years. A classical experimental apparatus was used to measure the mean velocity field and wall shear stress through four historical techniques: static pressure drop; mean square signals measured from a hot-wire; Preston tube; and Clauser plot. Computational Fluid Dynamics (CFD) was used to simulate the pipe flow, utilizing the Reynolds-averaged Navier–Stokes (RANS) method with different two-equation turbulence models. The performance of each approach was assessed to compare the experimental and computational methods. This comparison revealed that the numerical results produced a close agreement with the experiments. The finding shows that, in some cases, CFD simulations could be used as alternative or complementary methods to experimental techniques for analyzing fully developed turbulent pipe flow