Cuantificación del retroceso glaciar del nevado del Tolima, aplicando técnicas de teledetección

La variación climática del periodo cuaternario está afectando los elementos que componen la superficie terrestre, entre ellos se observa el retroceso glaciar, fuente de las principales cuencas hidrográficas que vierten sus aguas al Rio Magdalena uno de los más importantes de nuestro país. Este proceso de fusión (deglaciación de las masas de hielo), ha ido aumentando en las últimas décadas según datos del IDEAM (Instituto de Hidrología, Meteorología y Estudios Ambientales), evidenciando la perdida de la masa del Volcán Nevado del Tolima, que se encuentra en la parte superior del cono volcánico en la cordillera central colombiana y con un altitud aproximada de 5250 msnm. Esta dinámica se observó y cuantifico a través de la interpretación y procesamiento radiométrico de imágenes satelitales del programa espacial Copérnico con su misión Sentinel-2. La investigación se realizó aplicando la siguiente metodología: 1- Selección y descarga de la imagen satelital que cubre la zona de estudio. 2- Corrección radiométrica de los datos satelitales. 3- Determinación de la masa glaciar mediante índices espectrales (NDSI y Ratio simple). 4- Segmentación de la imagen utilizando una clasificación no supervisada y por último la cuantificación de la masa glaciar. Como resultado de la presente investigación al aplicar el primer método NDSI (Normalised Difference Snow Índex), se observa una pérdida aproximada de 16,71% con respecto a la información del IDEAM 74,84 Ha, y aplicando el segundo método de Ratio simple (Rott H, 1994), un retroceso glaciar de 15,24% con respecto a la misma información oficial del país

Propuesta en Supply Chain Management y Logística en la empresa Bayer S.A.

Imágenes, tablas, gráficasEste proyecto final se realiza para aplicar todos los conocimientos adquiridos durante todas las fases del diplomado. Inicialmente en la fase 2, se identificaron los miembros de la Red a la cual pertenece la empresa (Clientes y proveedores), se elabora la red estructural y se explica cada una de las dimensiones estructurales de la red de valor. En la fase 3, el grupo colaborativo describe los procesos para la empresa, según enfoque del GSCF. Para la fase 4, se describen los procesos para Bayer S.A., según enfoque de APICS-SCOR. Seguidamente en la fase 5, se analiza la posición de Colombia en términos de logística, según informe del Banco Mundial. En la Fase 6, sepropone un modelo de gestión de inventarios para la empresa antes mencionada. Así mismo en la fase 7, se propone un Layout para el almacén o centro de distribución de la empresa objeto de estudio. En la fase 8, seidentificar los modos y medios de transporte utilizados. En la fase 9, se propone una estrategia de aprovisionamiento. Para la fase 10, se Identificar los beneficios al implementar estrategias de DRP y TMS. En la fase 11, se logra identificar las megatendencias en Supply Chain Management y logística. Una vez analizadas las fases 2 hasta la 10, el grupo colaborativo finalmente realiza una propuesta en Supply Chain Management y Logística en la empresa Bayer S.A.This final project is carried out to apply all the knowledge acquired during all the stages of the diploma course. Initially in phase 2, the members of the Network to which the company belongs (Clients and suppliers) were identified, the structural network is elaborated and each of the structural dimensions of the value network is explained. In phase 3, the collaborative group describes the processes for the company, according to the GSCF's approach. For phase 4, the processes for Bayer S.A. are described, according to the APICS-SCOR approach. Then in phase 5, Colombia's position in terms of logistics is analyzed, according to a World Bank report. In Phase 6, an inventory management model for the aforementioned company is proposed. Likewise, in phase 7, a Layout is proposed for the warehouse or distribution center of the company under study. In phase 8, the modes and means of transport used will be identified. In phase 9, a sourcing strategy is proposed. For phase 10, identify the benefits of implementing DRP and TMS strategies. In phase 11, it is possible to identify the mega-trends in Supply Chain Management and logistics. Once phases 2 through 10 have been analyzed, the collaborative group finally makes a proposal for Supply Chain Management and Logistics at Bayer S.A

Formulation of the public policy of sport and physical activity, from a participatory approach in a Colombian municipality

Introducción: el desarrollo constitucional y legal ha favorecido la participación de la ciudadanía en la formulación de políticas públicas. Sin embargo, el rol de los grupos de interés en contextos específicos es limitado, en especial, en el sector del deporte y la actividad física, por tanto, se desconocen sus etapas de formulación, desde lo local, debido al predominio de investigaciones desde lo nacional y la falta de una visión “bottom-up”. Objetivo general: describir la formulación de la política pública del deporte y la actividad física desde el enfoque participativo en un municipio colombiano. Materiales y métodos: se desarrolló una metodología cualitativa, teniendo como muestra un municipio colombiano. Resultados y discusión: se evidenció que con participación de los grupos de interés es factible formular una política pública para el sector que resuelva las problemáticas de una comunidad. Conclusión: para plantear alternativas de solución, es necesario tener en cuenta el enfoque y principio de participación activa de los grupos de interés del sector.Introduction: The constitutional and legal development has favored the participation of citizens in the formulation of public policies. However, the role of stakeholders in specific contexts is limited, especially in the sport and physical activity sector, therefore, their formulation stages are unknown, from the local level, due to the predominance of research from the national level and the lack of a "bottomup" vision. Objective: To describe the formulation of public policy on sport and physical activity from a participatory approach in a municipality of Colombia. Materials and methods: A qualitative methodology was developed, having as sample a municipality of Colombia. Results and discussion: It was shown that with the participation of stakeholders it is feasible to formulate a public policy for the sector that solves the problems of a community. Conclusion: In order to propose alternative solutions, it is necessary to take into account the approach and principle of active participation of the sector's stakeholdersIncluye referencias bibliográfica

The 2nd Workshop on Maritime Computer Vision (MaCVi) 2024

The 2nd Workshop on Maritime Computer Vision (MaCVi) 2024 addresses maritime computer vision for Unmanned Aerial Vehicles (UAV) and Unmanned Surface Vehicles (USV). Three challenges categories are considered: (i) UAV-based Maritime Object Tracking with Re-identification, (ii) USV-based Maritime Obstacle Segmentation and Detection, (iii) USV-based Maritime Boat Tracking. The USV-based Maritime Obstacle Segmentation and Detection features three sub-challenges, including a new embedded challenge addressing efficicent inference on real-world embedded devices. This report offers a comprehensive overview of the findings from the challenges. We provide both statistical and qualitative analyses, evaluating trends from over 195 submissions. All datasets, evaluation code, and the leaderboard are available to the public at https://macvi.org/workshop/macvi24.Comment: Part of 2nd Workshop on Maritime Computer Vision (MaCVi) 2024 IEEE Xplore submission as part of WACV 202

Measurement of the Forward-Backward Asymmetry in the B -> K(*) mu+ mu- Decay and First Observation of the Bs -> phi mu+ mu- Decay

We reconstruct the rare decays $B^+ \to K^+\mu^+\mu^-$, $B^0 \to K^{*}(892)^0\mu^+\mu^-$, and $B^0_s \to \phi(1020)\mu^+\mu^-$ in a data sample corresponding to $4.4 {\rm fb^{-1}}$ collected in $p\bar{p}$ collisions at $\sqrt{s}=1.96 {\rm TeV}$ by the CDF II detector at the Fermilab Tevatron Collider. Using $121 \pm 16$ $B^+ \to K^+\mu^+\mu^-$ and $101 \pm 12$ $B^0 \to K^{*0}\mu^+\mu^-$ decays we report the branching ratios. In addition, we report the measurement of the differential branching ratio and the muon forward-backward asymmetry in the $B^+$ and $B^0$ decay modes, and the $K^{*0}$ longitudinal polarization in the $B^0$ decay mode with respect to the squared dimuon mass. These are consistent with the theoretical prediction from the standard model, and most recent determinations from other experiments and of comparable accuracy. We also report the first observation of the $B^0_s \to \phi\mu^+\mu^- decay and measure its branching ratio${\mathcal{B}}(B^0_s \to \phi\mu^+\mu^-) = [1.44 \pm 0.33 \pm 0.46] \times 10^{-6}$using$27 \pm 6$signal events. This is currently the most rare$B^0_s$ decay observed.Comment: 7 pages, 2 figures, 3 tables. Submitted to Phys. Rev. Let

Measurements of the properties of Lambda_c(2595), Lambda_c(2625), Sigma_c(2455), and Sigma_c(2520) baryons

We report measurements of the resonance properties of Lambda_c(2595)+ and Lambda_c(2625)+ baryons in their decays to Lambda_c+ pi+ pi- as well as Sigma_c(2455)++,0 and Sigma_c(2520)++,0 baryons in their decays to Lambda_c+ pi+/- final states. These measurements are performed using data corresponding to 5.2/fb of integrated luminosity from ppbar collisions at sqrt(s) = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. Exploiting the largest available charmed baryon sample, we measure masses and decay widths with uncertainties comparable to the world averages for Sigma_c states, and significantly smaller uncertainties than the world averages for excited Lambda_c+ states.Comment: added one reference and one table, changed order of figures, 17 pages, 15 figure

Search for a New Heavy Gauge Boson Wprime with Electron + missing ET Event Signature in ppbar collisions at sqrt(s)=1.96 TeV

We present a search for a new heavy charged vector boson $W^\prime$ decaying to an electron-neutrino pair in $p\bar{p}$ collisions at a center-of-mass energy of 1.96\unit{TeV}. The data were collected with the CDF II detector and correspond to an integrated luminosity of 5.3\unit{fb}^{-1}. No significant excess above the standard model expectation is observed and we set upper limits on $\sigma\cdot{\cal B}(W^\prime\to e\nu)$. Assuming standard model couplings to fermions and the neutrino from the $W^\prime$ boson decay to be light, we exclude a $W^\prime$ boson with mass less than 1.12\unit{TeV/}c^2 at the 95\unit{%} confidence level.Comment: 7 pages, 2 figures Submitted to PR

Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV

The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 inverse picobarns of data collected in pp collisions at sqrt(s) = 7 TeV at the LHC in 2010. A few benchmark sets of selection criteria covering a wide range of physics analysis needs have been examined. For all considered selections, the efficiency to reconstruct and identify a muon with a transverse momentum pT larger than a few GeV is above 95% over the whole region of pseudorapidity covered by the CMS muon system, abs(eta) < 2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with pT above a few GeV is higher than 90% over the full eta range, and typically substantially better. The overall momentum scale is measured to a precision of 0.2% with muons from Z decays. The transverse momentum resolution varies from 1% to 6% depending on pseudorapidity for muons with pT below 100 GeV and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.Comment: Replaced with published version. Added journal reference and DO

Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy

A search for new physics is performed in events with two same-sign isolated leptons, hadronic jets, and missing transverse energy in the final state. The analysis is based on a data sample corresponding to an integrated luminosity of 4.98 inverse femtobarns produced in pp collisions at a center-of-mass energy of 7 TeV collected by the CMS experiment at the LHC. This constitutes a factor of 140 increase in integrated luminosity over previously published results. The observed yields agree with the standard model predictions and thus no evidence for new physics is found. The observations are used to set upper limits on possible new physics contributions and to constrain supersymmetric models. To facilitate the interpretation of the data in a broader range of new physics scenarios, information on the event selection, detector response, and efficiencies is provided.Comment: Published in Physical Review Letter

Compressed representation of a partially defined integer function over multiple arguments

In OLAP (OnLine Analitical Processing) data are analysed in an n-dimensional cube. The cube may be represented as a partially defined function over n arguments. Considering that often the function is not defined everywhere, we ask: is there a known way of representing the function or the points in which it is defined, in a more compact manner than the trivial one