8,110 research outputs found
Suma
No full textResumen del autorSe plantea el problema clásico (sen a)/a (sen b)/b si 0 a b pi/2 en términos totalmente diferentes, prescindiendo del cálculo diferencial que es en general el modo de abordarlo, y aprovechar toda la intuición del enunciado dentro de un desarrollo sobre relaciones entre razones trigonométricas y arcos, potenciando el concepto de radián, la proporcionalidad y la semejanza.ES
Suma
No full textSe presentan diferentes significados para la fracción (a+c):(b+d) asociada a dos fracciones a-b y c-d. Con esto se pretende mostrar diferentes consideraciones didácticas que giran en torno a estas fracciones.Universitat de Barcelona. Biblioteca de Ciències de l'Educació; Passeig de la Vall d'Hebron, 171; 08035 Barcelona; +34934021035; +34934021034;ES
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No full textResumen basado en el de los autorAnálisis comparativo de dos currículos en el área de matemáticas del contexto europeo actual, con el objetivo de reflexionar sobre los contenidos que se trabajan.Universitat de Barcelona. Biblioteca de Ciències de l'Educació; Passeig de la Vall d'Hebron, 171; 08035 Barcelona; +34934021035; +34934021034;ES
Complete genome sequence of rhynchophorus ferrugineus endocytobiont candidatus nardonella dryophthoridicola strain NardRF
Get PDFWe report the complete genome sequence and annotation of “Candidatus Nardonella dryophthoridicola” strain NardRF, obtained by sequencing its host bacteriome, Rhynchophorus ferrugineus, using Oxford Nanopore technology
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No full textExperiencia llevada a cabo en un aula de matemáticas con el objetivo de ver cómo se concibe la enseñanza de las matemáticas en la escuela. A partir de transcripciones de estudiantes entre 10 y 11 años se extraen diversas conclusiones sobre la forma de trabajar los problemas de matemáticas. A partir de esta forma de resolver los problemas se extraen conclusiones en referencia a la forma de trabajar de los propios matemáticos- El proceso de análisis para resolver las situaciones matemáticas es similar en los alumnos y en los investigadores.ES
Suma
No full textResumen de la publicaciónSe presenta una visión particular de las matemáticas, un ejemplo de ruta matemática como recurso didáctico para utilizar con los estudiantes. Esta visión se refiere a observación, interpretación, aplicación y conexión de lo que se ve. Finalmente se exponen algunas sugerencias de su aplicación en las aulas.Universitat de Barcelona. Biblioteca de Ciències de l'Educació; Passeig de la Vall D'Hebron, 171; 08035 Barcelona; +34934021035; +34934021034;ES
La sindrome eclamptica
No full textGli AA analizzano le patologie più frequentemente osservate ed ii risultati clinici ottenuti nei primi 5 anni di attività del Centro di Rianimazione di Padova (1969-1974) che coincidono con la nascita ed i primi sviluppi della nostra Disciplina in Italia
RNA Pore Translocation with Static and Periodic Forces: Effect of Secondary and Tertiary Elements on Process Activation and Duration
Get PDFWe use MD simulations to study the pore translocation properties of a pseudoknotted viral RNA. We consider the 71-nucleotide-long xrRNA from the Zika virus and establish how it responds when driven through a narrow pore by static or periodic forces applied to either of the two termini. Unlike the case of fluctuating homopolymers, the onset of translocation is significantly delayed with respect to the application of static driving forces. Because of the peculiar xrRNA architecture, activation times can differ by orders of magnitude at the two ends. Instead, translocation duration is much smaller than activation times and occurs on time scales comparable at the two ends. Periodic forces amplify significantly the differences at the two ends, for both activation times and translocation duration. Finally, we use a waiting-times analysis to examine the systematic slowing downs in xrRNA translocations and associate them to the hindrance of specific secondary and tertiary elements of xrRNA. The findings provide a useful reference to interpret and design future theoretical and experimental studies of RNA translocation
Hydrodynamic effects on the liquid-hexatic transition of active colloids
No full textWe study numerically the role of hydrodynamics in the liquid-hexatic
transition of active colloids at intermediate activity, where motility induced
phase separation (MIPS) does not occur. We show that in the case of active
Brownian particles (ABP), the critical density of the transition decreases upon
increasing the particle's mass, enhancing ordering, while self-propulsion has
the opposite effect in the activity regime considered. Active hydrodynamic
particles (AHP), instead, undergo the liquid-hexatic transition at higher
values of packing fraction than the corresponding ABP, suggesting that
hydrodynamics have the net effect of disordering the system. At increasing
densities, close to the hexatic-liquid transition, we found in the case of AHP
the appearance of self-sustained organized motion with clusters of particles
moving coherently.Comment: 14 pages, 13 figure
3D polymer simulations of genome organization and transcription across different chromosomes and cell types
Get PDFWe employ the diffusing transcription factors model for numerical simulation
of chromatin topology conformations and transcriptional processes of human
chromatin. Simulations of a short chromatin filament reveal different possible
pathways to regulate transcription: it is shown that the transcriptional
activity profile can be regulated and controlled by either acting on the chain
structural properties, or on external factors, such as the number of
transcription factors. Additionally, comparisons between GRO-seq experimental
data and large scale numerical simulation of entire chromosomes from the human
umbilical vein endothelial cell and the B-lmphocyte GM12878 show that the model
provides reliable and statistically significant predictions for transcription
across different cell-lines.Comment: 26 pages, 10 figure
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