Razones trigonométricas

Esta cartilla pertenece a la serie Unidades didácticas en Educación Matemática de “una empresa docente” (Facultad de Educación, Universidad de los Andes) y ediciones SM. Propone el diseño de una unidad didáctica con el que se busca contribuir al aprendizaje de la noción de razón trigonométrica. Para ello, la cartilla presenta el material que el profesor de matemáticas de educación media requiere para implementar la unidad didáctica en el aula. La cartilla fue elaborada por los grupos 5 y 6 de la primera promoción de la maestría en Educación Matemática de la Universidad de los Andes. La cartilla se compone de cuatro partes. La primera presenta los aspectos que el pro fesor debe tener en cuenta antes de implementar las tareas propuestas en la unidad didáctica. La segunda contiene los objetivos de aprendizaje propuestos para los estu diantes y la metodología sugerida al profesor. La tercera describe la fundamentación y secuencia de tareas que conforman la unidad didáctica, e incluye el material foto copiable para los estudiantes. Por último, se indican sugerencias para evaluar a los estudiantes y se presentan pautas para identi car su nivel de desempeño y determinar el logro de los objetivos de aprendizaje. La secuencia de tareas busca contribuir a que los estudiantes identi quen las razones trigonométricas en los triángulos rectángulos y las utilicen para hallar medidas de la dos y ángulos en problemas matemáticos y no matemáticos; identi quen las razones trigonométricas en la circunferencia unitaria y las utilicen para hallar medidas de lados y ángulos en diferentes contextos; identi quen el triángulo rectángulo en problemas matemáticos y no matemáticos y utilicen las razones trigonométricas para solucionar los; y reconozcan la importancia de las razones trigonométricas para hallar la medida de ángulos y lados que no se pueden medir directamente y lo hagan en diferentes contextos. Su diseño se basa en dos ideas transversales: la noción de razón trigo nométrica es útil en contextos cercanos a los estudiantes y ellos pueden identi carla y comprenderla a partir de su experiencia (por ejemplo, con la medición y búsqueda de regularidades). Las tareas están elaboradas para ser implementadas con estudiantes de grado décimo. Su diseño surge de la necesidad de contribuir al logro del estándar curricular “describo y modelo fenómenos periódicos del mundo real usando relaciones y funciones trigonométricas”

Propuesta en Supply Chain Management y Logística en la Empresa Permoda Ltda.

Tabla de Procesos de Activación Modelo SCOR. Análisis Comparativo Índice de Desempeño Logístico según Banco Mundial. Elementos Fundamentales del Conpes 3547 Política Nacional Logística. Cuestionario: Instrumento de consulta para develar la forma de Inventarios. Plano General Layout propuesto, vistas en detalle. Mapa conceptual con el tema “TMS” (Transportation Management System). Cuestionario Procesos Logísticos en Aprovisionamiento. Formato de Evaluación de proveedores Permoda Ltda. Mapa conceptual “DRP” (Planeación de los Recursos de Distribución). Mapa conceptual “Mega tendencias en Supply Chain Management y Logística.La logística era el proceso que las empresas manejaban para traer las materias primas a la fábrica para luego llevar un producto terminado a sus cliente, ahora la dinámica es más compleja y la logística se volvió parte fundamental de la evolución del proceso que hoy llamamos Supply Chain o cadena de suministro. La cadena de suministro es la cooperación de todos los involucrados en el proceso que se realiza para tomar la materia prima, convertirla en un producto y llevar el producto terminado y de buena calidad al cliente final, para que esto se desarrolle adecuadamente debe haber una globalización de procesos con actualizaciones constantes y trabajo en equipo. En este trabajo tomamos la empresa Permoda LTDA. Del sector textil en la cual se desarrolla la metodología de Supply Chain buscando problemas como cuellos de botella que frenan la cadena de suministro, utilizando las herramientas ya establecidas de esta metodología, también se da un vistazo de cómo esta Colombia frente a otros países a nivel logístico y de infraestructura.Logistics was the process that companies managed to bring raw materials to the factory and then bring a finished product to their customers, now the dynamics are more complex and the logistics became a fundamental part of the evolution of the process that we now call Supply Chain or supply chain. The supply chain is the cooperation of all those involved in the process that is carried out to take the raw material, turn it into a product and bring the finished and good quality product to the end customer, so that this is properly developed there must be a globalization of processes with constant updates and teamwork. In this work we take the company Permoda LTDA. From the textile sector in which Supply Chain's methodology is developed looking for problems such as bottlenecks that slow down the supply chain, using the established tools of this methodology, there is also a glimpse of how Colombia is facing other countries at the logistic and infrastructure level

Desafíos actuales de la educación superior

El presente libro corresponde al trabajo investigativo realizado por sus autores frente a los desafíos que enfrenta y enfrentará la educación en tiempos actuales (provisional)

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV

Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at root s=13 TeV

Peer reviewe

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe

Measurement of t(t)over-bar normalised multi-differential cross sections in pp collisions at root s=13 TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

Peer reviewe

Observation of tW production in the single-lepton channel in pp collisions at root s=13 TeV

A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at root s = 13 TeV is presented. The data correspond to an integrated luminosity of 36 fb(-1) collected with the CMS detector at the CERN LHC in 2016. A boosted decision tree is used to separate the tW signal from the dominant t (t) over bar background, whilst the subleading W+jets and multijet backgrounds are constrained using data-based estimates. This result is the first observation of the tW process in final states containing a muon or electron and jets, with a significance exceeding 5 standard deviations. The cross section is determined to be 89 +/- 4 (stat) +/- 12 (syst) pb, consistent with the standard model.Peer reviewe