Sistematización de dos experiencias de educación artística popular : el caso CPC y CAF.

La sistematización de los procesos de educación Artística que adelantan la corporación Autónoma Forjar (CAF) y el Centro de Promoción y Cultura (CPC), visibiliza los aportes que la experiencia artística hace a la educación popular. Estas organizaciones desarrollan pedagogías alternativas en la zona suroccidental de Kennedy [en Bogotá] para transformar las dinámicas socioculturales [derivadas de las causas históricas que alimentan el conflicto armado interno] que se viven en este sector. Se propone interpretar estos procesos a través de una lectura sujeto(a)-sujeto(a), per sé una actitud autocrítica periódica, con el fin de aportar a los objetivos que se trazan estas organizaciones, que han logrado pervivir en el tiempo a través de la fórmula escogida -la educación artística- que les ha permitido oxigenarse y reinventarse. Es aquí donde se hace hincapié en que su praxis de educación artística tiene unas apuestas políticas y éticas particulares, que difieren de la de los organismos institucionales que tienen como misión la promoción de mercados culturales. La distancia política de ambas apuestas, permiten involucrar variables conceptuales que dejan entrever los tránsitos y matices de la gestión entre ambas fórmulas de las organizaciones populares. Esto se debe a los contextos de emergencia de ambos procesos organizativos, del desarrollo de capacidades (infraestructura, financiación, relevos generacionales etc.) Y la lectura de realidad, punto de partida de las acciones transformadoras en sus respectivos territorios

Measurements of concentration differences between liquid mixtures using digital holographic interferometry

We present an alternative method to detect and measure the concentration changes in liquid solutions. The method uses Digital Holographic Interferometry (DHI) and is based on measuring refractive index variations. The first hologram is recorded when a wavefront from light comes across an ordinary cylindrical glass container filled with a liquid solution. The second hologram is recorded after slight changing the liquid’s concentration. Differences in phase obtained from the correlation of the first hologram with the second one provide information about the refractive index variation, which is directly related to the changes in physical properties related to the concentration. The method can be used − with high sensitivity, accuracy, and speed − either to detect adulterations or to measure a slight change of concentration in the order of 0.001 moles which is equivalent to a difference of 0.003 g of sodium chloride in solutions. The method also enables to measure and calculate the phase difference among each pixel of two samples. This makes it possible to generate a global measurement of the phase difference of the entire sensed region

Poliolefinas reforzadas con óxido de grafeno reducido. Mediciones viscoelásticas

Se analiza el efecto de óxido de grafeno reducido y del óxido de polietileno sobre las propiedades viscoelásticas de HDPE y PP. Los gráficos de la viscosidad dinámica presentan curvas muy similares en todos los casos. Utilizando porcentajes de rGO de 0.1% con 2% de PEO, se obtienen valores del módulo elástico cuatro veces más grandes que los de HDPE puro y tres veces más que el del PP puro. Con 0.5% de rGO en ambos composites, manteniendo el mismo porcentaje de PEO, se obtiene un módulo elástico tres veces más grande que el de las poliolefinas puras

Strengthening the teaching of the narrative genre: story and fable in primary school children in the Department of Magdalena – Colombia. A commitment to the use of ICT games and bayesian logistic regression

The low quality and relevance at all educational levels remain a problem present in education in Colombia, limiting the training and development of skills for work and for life. The above is evidenced in the results of the country in standardized tests. Colombia occupies one of the last places the two most recognized international tests (TIMMS and PISA); In fact, it is considered that ―at the international level, one of the benchmarks for measuring scientific competences is the PISA tests, which assess the knowledge, skills, and scientific attitudes of 15-year-old students in different countries. In 2006, PISA tests were applied to young Colombians. While it is true that the test results show the motivation of young Colombians to project in the scientific field (those evaluated had high scores in the subcompetence of identification of scientific phenomena), the country lags in other competences that are more related Direct with innovation processes, such as explaining scientific events and using scientific evidence. This article resulted from the research project: ―Strengthening of citizen and democratic culture in CT + I through the iep supported in ICT in the Department of Magdalena financed by SIGR funds - General System of Royalties

Thymidylate synthase gene variants as predictors of clinical response and toxicity to fluoropyrimidine-based chemotherapy for colorectal cancer

Abstract Background: Fluoropyrimidines form the chemotherapy backbone of advanced and metastatic colorectal cancer (CRC). These drugs are frequently associated with toxicity events that result in dose adjustments and even suspension of the treatment. The thymidylate synthase (TYMS) gene is a potential marker of response and toxicity to fluoropyirimidines as this enzyme is the molecular target of these drugs. Our aim was to assess the association between variants of TYMS with response and toxicity to fluoropyrimidines in patients with CRC in independent retrospective and prospective studies. Methods: Variants namely rs45445694, rs183205964, rs2853542 and rs151264360 of TYMS were genotyped in 105 CRC patients and were evaluated to define their association with clinical response and toxicity to fluoropyrimidines. Additionally, the relationship between genotypes and tumor gene expression was analyzed by quantitative polymerase chain reaction. Results: The 2R/2R (rs45445694) was associated with clinical response (p = 0.05, odds ratio (OR) = 3.45) and severe toxicity (p = 0.0014, OR = 5.21, from pooled data). Expression analysis in tumor tissues suggested a correlation between the 2R/2R genotype and low TYMS expression. Conclusions: The allele 2R (rs45445694) predicts severe toxicity and objective response in advanced CRC patients. In addition, the alleles G(rs2853542) and 6bp-(rs151264360) are independent predictors of response failure to chemotherapy. This is the first study made on a Latin American population that points out TYMS gene variants have predictive values for response and toxicity in patients with CRC treated with fluoropyrimidine-based chemotherapy

Interes Compuesto

Unidad 19 del módulo “Fundamentos de finanzas” de la serie “Administración cooperativa” en la que se explican los conceptos básicos sobre el interés compuesto, resolución de problemas de valor futuro y valor presente.Unit 19 of the module "Fundamentals of finance" of the series "Cooperative administration" in which the basic concepts of compound interest, resolution of problems of future value and present value are explained.Interés compuesto -- Valor futuro -- Capitalización en fracciones de año -- Mensual -- Semestral -- Trimestral -- Diario -- Valor presente -- Valor presente en fracciones de añona31 página

Constraints on Higgs boson properties using WW∗(→ eνμν) jj production in 36.1fb-1 of √s=13 TeV pp collisions with the ATLAS detector

This article presents the results of two studies of Higgs boson properties using the WW(→ eνμν) jj final state, based on a dataset corresponding to 36.1 fb of s=13 TeV proton–proton collisions recorded by the ATLAS experiment at the Large Hadron Collider. The first study targets Higgs boson production via gluon–gluon fusion and constrains the CP properties of the effective Higgs–gluon interaction. Using angular distributions and the overall rate, a value of tan (α) = 0.0 ± 0.4 (stat.) ± 0.3 (syst.) is obtained for the tangent of the mixing angle for CP-even and CP-odd contributions. The second study exploits the vector-boson fusion production mechanism to probe the Higgs boson couplings to longitudinally and transversely polarised W and Z bosons in both the production and the decay of the Higgs boson; these couplings have not been directly constrained previously. The polarisation-dependent coupling-strength scale factors are defined as the ratios of the measured polarisation-dependent coupling strengths to those predicted by the Standard Model, and are determined using rate and kinematic information to be aL=0.91-0.18+0.10(stat.)-0.17+0.09(syst.) and a= 1.2 ± 0.4 (stat.)-0.3+0.2(syst.). These coupling strengths are translated into pseudo-observables, resulting in κVV=0.91-0.18+0.10(stat.)-0.17+0.09(syst.) and ϵVV=0.13-0.20+0.28 (stat.)-0.10+0.08(syst.). All results are consistent with the Standard Model predictions

Search for neutral long-lived particles in pp collisions at √s = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter

A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb of proton-proton collision data collected by the ATLAS detector at the LHC in 2015–2018 at a centre-of-mass energy of 13 TeV. Dedicated techniques were developed for the reconstruction of displaced jets produced by LLPs decaying hadronically in the ATLAS hadronic calorimeter. Two search regions are defined for different LLP kinematic regimes. The observed numbers of events are consistent with the expected background, and limits for several benchmark signals are determined. For a SM Higgs boson with a mass of 125 GeV, branching ratios above 10% are excluded at 95% confidence level for values of c times LLP mean proper lifetime in the range between 20 mm and 10 m depending on the model. Upper limits are also set on the cross-section times branching ratio for scalars with a mass of 60 GeV and for masses between 200 GeV and 1 TeV. [Figure not available: see fulltext.

Search for resonances decaying into a weak vector boson and a Higgs boson in the fully hadronic final state produced in proton-proton collisions at s =13 TeV with the ATLAS detector

A search for heavy resonances decaying into a W or Z boson and a Higgs boson produced in proton-proton collisions at the Large Hadron Collider at s=13 TeV is presented. The analysis utilizes the dominant W→qq¯′ or Z→qq¯ and H→bb¯ decays with substructure techniques applied to large-radius jets. A sample corresponding to an integrated luminosity of 139 fb-1 collected with the ATLAS detector is analyzed and no significant excess of data is observed over the background prediction. The results are interpreted in the context of the heavy vector triplet model with spin-1 W′ and Z′ bosons. Upper limits on the cross section are set for resonances with mass between 1.5 and 5.0 TeV, ranging from 6.8 to 0.53 fb for W′→WH and from 8.7 to 0.53 fb for Z′→ZH at the 95% confidence level

Constraints on Higgs boson production with large transverse momentum using H →b b ¯ decays in the ATLAS detector

This paper reports constraints on Higgs boson production with transverse momentum above 1 TeV. The analyzed data from proton-proton collisions at a center-of-mass energy of 13 TeV were recorded with the ATLAS detector at the Large Hadron Collider from 2015 to 2018 and correspond to an integrated luminosity of 136 fb-1. Higgs bosons decaying into bb¯ are reconstructed as single large-radius jets recoiling against a hadronic system and are identified by the experimental signature of two b-hadron decays. The experimental techniques are validated in the same kinematic regime using the Z→bb¯ process. The 95% confidence-level upper limit on the cross section for Higgs boson production with transverse momentum above 450 GeV is 115 fb, and above 1 TeV it is 9.6 fb. The Standard Model cross section predictions for a Higgs boson with a mass of 125 GeV in the same kinematic regions are 18.4 fb and 0.13 fb, respectively