Visualización espacial en hombres y en mujeres. Un estudio de caso. / Spatial visualization in men and women. A case study.

En el aprendizaje de la geometría, es necesario reconocer el desarrollo cognitivo y los procesos fundamentales que se realiza mediante procesos como la visualización, tales como la demostración. En los resultados del siguiente estudio de caso se establece una comparación entre géneros, haciendo un contraste teórico y experimental para su posterior análisis y balance final, precisando en las habilidades visuales de hombres y mujeres respectivamente. Abstract. In learning geometry, it is necessary to recognize the cognitive development and the fundamental processes is done through processes such as visualization, such as the demonstration. The results of following case, study a comparison established genres, making a theoretical and experimental contrast for further analysis and final balance, showing the visual skills of men and women respectively

Visualización espacial en hombres y en mujeres. Un estudio de caso. / Spatial visualization in men and women. A case study.

En el aprendizaje de la geometría, es necesario reconocer el desarrollo cognitivo y los procesos fundamentales que se realiza mediante procesos como la visualización, tales como la demostración. En los resultados del siguiente estudio de caso se establece una comparación entre géneros, haciendo un contraste teórico y experimental para su posterior análisis y balance final, precisando en las habilidades visuales de hombres y mujeres respectivamente.Abstract.In learning geometry, it is necessary to recognize the cognitive development and the fundamental processes is done through processes such as visualization, such as the demonstration. The results of following case, study a comparison established genres, making a theoretical and experimental contrast for further analysis and final balance, showing the visual skills of men and women respectively

Análisis curricular sobre las dificultades y destrezas de los estudiantes de grado quinto, al trabajar nociones básicas de aritmética en relación a la jerarquía y uso de operaciones básicas en el conjunto de los números racionales

En este artículo se muestran los resultados de un trabajo de investigación sobre el diseño y aplicación de una serie de actividades contextualizadas en los intereses y gustos de estudiantes del grado quinto del I.E.D OEA en la sede A jornada de la tarde en la ciudad de Bogotá; estas actividades están enfocadas en el desarrollo y evaluación de la clase de matemáticas, lo cual permitió a los docentes en formación proponer un análisis curricular para la enseñanza de la jerarquía y operaciones básicas en el conjunto de los racionales, orientados por el currículo institucional (El proyecto educativo institucional y la malla curricular) y currículo orientador según documentos curriculares para el país de Colombia

Arquitetura de validação de projetos didáticos para a formação de professores de matemáticas

This article presents the results of the project “Didactic and technological development in didactic scenarios for the training of teachers who embrace diversity”. From a theoretical perspective of the universal design and from a political-ethical position of a mathematical education with everyone, the research provides an architecture as a research result to validate the didactic hypotheses that serve as the basis for the design of an environment and three virtual objects of learning. The didactic designs are validated in a training course for elementary school mathematics teachers, with instructional design for both face-to-face and online interactions. Architecture as a validation structure articulates the methodologies resulting from teaching experiments, design research, and communities of practice. The results focus on the validation of hypotheses about training of pre-service math teachers to accommodate the diversity of populations, accessible didactic designs, and methodologies for didactic validation in communities of practiceEste artículo presenta los resultados del proyecto “Desarrollo didáctico y tecnológico en escenarios didácticos para la formación de profesores que acogen la diversidad”. La investigación incorpora una perspectiva teórica del diseño universal y una posición ético-política de una educación matemática con todos. Se entrega como resultado de investigación una arquitectura para validar las hipótesis didácticas que fundamentan el diseño de un ambiente y tres objetos virtuales de aprendizaje. Los diseños didácticos son validados en un curso para formación de profesores de matemáticas de la educación básica, con diseño instruccional para la interacción cara a cara y en línea (virtual). La arquitectura como estructura de validación articula las metodologías provenientes de experimento de enseñanza, investigación en diseño y comunidades de práctica. Los resultados se centran en la validación de hipótesis sobre formación de profesores de matemáticas para acoger la diversidad de poblaciones, diseños didácticos accesibles y metodologías para la validación didáctica en comunidades de práctica.Este artigo apresenta os resultados do projeto “Desenvolvimento didático e tecnológico em cenários didáticos para a formação de professores que adotam a diversidade”. A pesquisa incorpora uma perspectiva teórica do design universal e uma posição ético-política de uma educação matemática com todos. Como resultado de investigação, é apresentada uma arquitetura para validar as hipóteses didáticas que fundamentam o desenho de um ambiente e três objetivos virtuais de aprendizagem. Os projetos didáticos são validados em uma aula para formação de professores de matemáticas de educação básica, com design instrucional para a interação face a face e online. A arquitetura como estrutura de validação articula as metodologias provenientes de experimento de ensino, pesquisa em projeto e comunidades de prática. Os resultados centram-se na validação de hipóteses sobre formação de professores de matemáticas para adotar a diversidade de populações, projetos didáticos acessíveis e metodologias para a validação didática em comunidades de prática

Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires

The production of tt‾ , W+bb‾ and W+cc‾ is studied in the forward region of proton–proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fb−1 . The W bosons are reconstructed in the decays W→ℓν , where ℓ denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 \mbox{fb}^{-1}. The $W$ bosons are reconstructed in the decays $W\rightarrow\ell\nu$, where $\ell$ denotes muon or electron, while the $b$ and $c$ quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

Peer reviewe

Search for anomalous couplings in boosted WW/WZ -> l nu q(q)over-bar production in proton-proton collisions at root s=8TeV

Peer reviewe

Global, regional, and national disability-adjusted life-years (DALYs) for 359 diseases and injuries and healthy life expectancy (HALE) for 195 countries and territories, 1990-2017: a systematic analysis for the Global Burden of Disease Study 2017.

How long one lives, how many years of life are spent in good and poor health, and how the population's state of health and leading causes of disability change over time all have implications for policy, planning, and provision of services. We comparatively assessed the patterns and trends of healthy life expectancy (HALE), which quantifies the number of years of life expected to be lived in good health, and the complementary measure of disability-adjusted life-years (DALYs), a composite measure of disease burden capturing both premature mortality and prevalence and severity of ill health, for 359 diseases and injuries for 195 countries and territories over the past 28 years. Methods We used data for age-specific mortality rates, years of life lost (YLLs) due to premature mortality, and years lived with disability (YLDs) from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2017 to calculate HALE and DALYs from 1990 to 2017. We calculated HALE using age-specific mortality rates and YLDs per capita for each location, age, sex, and year. We calculated DALYs for 359 causes as the sum of YLLs and YLDs. We assessed how observed HALE and DALYs differed by country and sex from expected trends based on Socio-demographic Index (SDI). We also analysed HALE by decomposing years of life gained into years spent in good health and in poor health, between 1990 and 2017, and extra years lived by females compared with males. Findings Globally, from 1990 to 2017, life expectancy at birth increased by 7·4 years (95% uncertainty interval 7·1-7·8), from 65·6 years (65·3-65·8) in 1990 to 73·0 years (72·7-73·3) in 2017. The increase in years of life varied from 5·1 years (5·0-5·3) in high SDI countries to 12·0 years (11·3-12·8) in low SDI countries. Of the additional years of life expected at birth, 26·3% (20·1-33·1) were expected to be spent in poor health in high SDI countries compared with 11·7% (8·8-15·1) in low-middle SDI countries. HALE at birth increased by 6·3 years (5·9-6·7), from 57·0 years (54·6-59·1) in 1990 to 63·3 years (60·5-65·7) in 2017. The increase varied from 3·8 years (3·4-4·1) in high SDI countries to 10·5 years (9·8-11·2) in low SDI countries. Even larger variations in HALE than these were observed between countries, ranging from 1·0 year (0·4-1·7) in Saint Vincent and the Grenadines (62·4 years [59·9-64·7] in 1990 to 63·5 years [60·9-65·8] in 2017) to 23·7 years (21·9-25·6) in Eritrea (30·7 years [28·9-32·2] in 1990 to 54·4 years [51·5-57·1] in 2017). In most countries, the increase in HALE was smaller than the increase in overall life expectancy, indicating more years lived in poor health. In 180 of 195 countries and territories, females were expected to live longer than males in 2017, with extra years lived varying from 1·4 years (0·6-2·3) in Algeria to 11·9 years (10·9-12·9) in Ukraine. Of the extra years gained, the proportion spent in poor health varied largely across countries, with less than 20% of additional years spent in poor health in Bosnia and Herzegovina, Burundi, and Slovakia, whereas in Bahrain all the extra years were spent in poor health. In 2017, the highest estimate of HALE at birth was in Singapore for both females (75·8 years [72·4-78·7]) and males (72·6 years [69·8-75·0]) and the lowest estimates were in Central African Republic (47·0 years [43·7-50·2] for females and 42·8 years [40·1-45·6] for males). Globally, in 2017, the five leading causes of DALYs were neonatal disorders, ischaemic heart disease, stroke, lower respiratory infections, and chronic obstructive pulmonary disease. Between 1990 and 2017, age-standardised DALY rates decreased by 41·3% (38·8-43·5) for communicable diseases and by 49·8% (47·9-51·6) for neonatal disorders. For non-communicable diseases, global DALYs increased by 40·1% (36·8-43·0), although age-standardised DALY rates decreased by 18·1% (16·0-20·2)

Measurement of the J/ψ pair production cross-section in pp collisions at s=13 \sqrt{s}=13 TeV

The production cross-section of J/ψ pairs is measured using a data sample of pp collisions collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=13$ TeV, corresponding to an integrated luminosity of 279 ±11 pb$^{−1}$. The measurement is performed for J/ψ mesons with a transverse momentum of less than 10 GeV/c in the rapidity range 2.0 < y < 4.5. The production cross-section is measured to be 15.2 ± 1.0 ± 0.9 nb. The first uncertainty is statistical, and the second is systematic. The differential cross-sections as functions of several kinematic variables of the J/ψ pair are measured and compared to theoretical predictions.The production cross-section of $J/\psi$ pairs is measured using a data sample of $pp$ collisions collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s} = 13 \,{\mathrm{TeV}}$, corresponding to an integrated luminosity of $279 \pm 11 \,{\mathrm{pb^{-1}}}$. The measurement is performed for $J/\psi$ mesons with a transverse momentum of less than $10 \,{\mathrm{GeV}}/c$ in the rapidity range $2.0<y<4.5$. The production cross-section is measured to be $15.2 \pm 1.0 \pm 0.9 \,{\mathrm{nb}}$. The first uncertainty is statistical, and the second is systematic. The differential cross-sections as functions of several kinematic variables of the $J/\psi$ pair are measured and compared to theoretical predictions