The noisy Hegselmann-Krause model for opinion dynamics

In the model for continuous opinion dynamics introduced by Hegselmann and Krause, each individual moves to the average opinion of all individuals within an area of confidence. In this work we study the effects of noise in this system. With certain probability, individuals are given the opportunity to change spontaneously their opinion to another one selected randomly inside the opinion space with different rules. If the random jump does not occur, individuals interact through the Hegselmann-Krause's rule. We analyze two cases, one where individuals can carry out opinion random jumps inside the whole opinion space, and other where they are allowed to perform jumps just inside a small interval centered around the current opinion. We found that these opinion random jumps change the model behavior inducing interesting phenomena. Using pattern formation techniques, we obtain approximate analytical results for critical conditions of opinion cluster formation. Finally, we compare the results of this work with the noisy version of the Deffuant et al. model for continuous-opinion dynamics

Quantum non-Markovian behavior at the chaos border

In this work we study the non-Markovian behaviour of a qubit coupled to an environment in which the corresponding classical dynamics change from integrable to chaotic. We show that in the transition region, where the dynamics has both regular islands and chaotic areas, the average non-Markovian behaviour is enhanced to values even larger than in the regular regime. This effect can be related to the non-Markovian behaviour as a function of the the initial state of the environment, where maxima are attained at the regions dividing separate areas in classical phase space, particularly at the borders between chaotic and regular regions. Moreover, we show that the fluctuations of the fidelity of the environment -- which determine the non-Markovianity measure -- give a precise image of the classical phase portrait.Comment: 23 pages, 9 figures (JPA style). Closest to published versio

The logarithmic contribution to the QCD static energy at NNNNLO

Using pNRQCD and known results for the field strength correlator, we calculate the ultrasoft contribution to the QCD static energy of a quark-antiquark pair at short distances at NNNNLO in alpha_s. At the same order, this provides the logarithmic terms of the singlet static potential in pNRQCD and the log alpha_s terms of the static energy.Comment: 16 pages, 5 figures. Minor modifications. References added. Journal versio

Stochastic Cooperative Decision Approach for Studying the Symmetric Behavior of People in Wireless Indoor Location Systems

[EN] Nowadays, several wireless location systems have been developed in the research world. The goal of these systems has always been to find the greatest accuracy as possible. However, if every node takes data from the environment, we can gather a lot of information, which may help us understand what is happening around our network in a cooperative way. In order to develop this cooperative location and tracking system, we have implemented a sensor network to capture data from user devices. From this captured data we have observed a symmetry behavior in people's movements at a specific site. By using these data and the symmetry feature, we have developed a statistical cooperative approach to predict the new user's location. The system has been tested in a real environment, evaluating the next location predicted by the system and comparing it with the next location in the real track, thus getting satisfactory results. Better results have been obtained when the stochastic cooperative approach uses the transition matrix with symmetry.This work is supported by the "Universitat Politecnica de Valencia" through "PAID-05-12".Tomás Gironés, J.; García Pineda, M.; Canovas Solbes, A.; Lloret, J. (2016). Stochastic Cooperative Decision Approach for Studying the Symmetric Behavior of People in Wireless Indoor Location Systems. Symmetry (Basel). 8(7):1-13. https://doi.org/10.3390/sym8070061S11387Gu, Y., Lo, A., & Niemegeers, I. (2009). A survey of indoor positioning systems for wireless personal networks. IEEE Communications Surveys & Tutorials, 11(1), 13-32. doi:10.1109/surv.2009.090103Maghdid, H. S., Lami, I. A., Ghafoor, K. Z., & Lloret, J. (2016). Seamless Outdoors-Indoors Localization Solutions on Smartphones. ACM Computing Surveys, 48(4), 1-34. doi:10.1145/2871166Li, F., Zhao, C., Ding, G., Gong, J., Liu, C., & Zhao, F. (2012). A reliable and accurate indoor localization method using phone inertial sensors. Proceedings of the 2012 ACM Conference on Ubiquitous Computing - UbiComp ’12. doi:10.1145/2370216.2370280Zheng, Y., Shen, G., Li, L., Zhao, C., Li, M., & Zhao, F. (2014). Travi-Navi. Proceedings of the 20th annual international conference on Mobile computing and networking - MobiCom ’14. doi:10.1145/2639108.2639124Sendra, S., Lloret, J., Turró, C., & Aguiar, J. M. (2014). IEEE 802.11a/b/g/n short-scale indoor wireless sensor placement. International Journal of Ad Hoc and Ubiquitous Computing, 15(1/2/3), 68. doi:10.1504/ijahuc.2014.059901Farid, Z., Nordin, R., & Ismail, M. (2013). Recent Advances in Wireless Indoor Localization Techniques and System. Journal of Computer Networks and Communications, 2013, 1-12. doi:10.1155/2013/185138Jain, A. K., Duin, P. W., & Jianchang Mao. (2000). Statistical pattern recognition: a review. IEEE Transactions on Pattern Analysis and Machine Intelligence, 22(1), 4-37. doi:10.1109/34.824819Fitzek, F. H. P., & Katz, M. D. (Eds.). (2006). Cooperation in Wireless Networks: Principles and Applications. doi:10.1007/1-4020-4711-8Nosratinia, A., Hunter, T. E., & Hedayat, A. (2004). Cooperative communication in wireless networks. IEEE Communications Magazine, 42(10), 74-80. doi:10.1109/mcom.2004.1341264Ammari, H. M. (2010). Coverage in Wireless Sensor Networks: A Survey. Network Protocols and Algorithms, 2(2). doi:10.5296/npa.v2i2.276Hsiao-Wecksler, E. T., Polk, J. D., Rosengren, K. S., Sosnoff, J. J., & Hong, S. (2010). A Review of New Analytic Techniques for Quantifying Symmetry in Locomotion. Symmetry, 2(2), 1135-1155. doi:10.3390/sym2021135Nunes, B. A. A., & Obraczka, K. (2011). On the symmetry of user mobility in wireless networks. 2011 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks. doi:10.1109/wowmom.2011.5986146Deng, Z., Yu, Y., Yuan, X., Wan, N., & Yang, L. (2013). Situation and development tendency of indoor positioning. China Communications, 10(3), 42-55. doi:10.1109/cc.2013.6488829Lloret, J., Tomas, J., Garcia, M., & Canovas, A. (2009). A Hybrid Stochastic Approach for Self-Location of Wireless Sensors in Indoor Environments. Sensors, 9(5), 3695-3712. doi:10.3390/s90503695Feng, C., Au, W. S. A., Valaee, S., & Tan, Z. (2012). Received-Signal-Strength-Based Indoor Positioning Using Compressive Sensing. IEEE Transactions on Mobile Computing, 11(12), 1983-1993. doi:10.1109/tmc.2011.216Wang, J., Hu, A., Liu, C., & Li, X. (2015). A Floor-Map-Aided WiFi/Pseudo-Odometry Integration Algorithm for an Indoor Positioning System. Sensors, 15(4), 7096-7124. doi:10.3390/s150407096Dhruv Pandya, Ravi Jain, & Lupu, E. (s. f.). Indoor location estimation using multiple wireless technologies. 14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. doi:10.1109/pimrc.2003.1259108Garcia, M., Sendra, S., Lloret, J., & Canovas, A. (2011). Saving energy and improving communications using cooperative group-based Wireless Sensor Networks. Telecommunication Systems, 52(4), 2489-2502. doi:10.1007/s11235-011-9568-3Garcia, M., & Lloret, J. (2009). A Cooperative Group-Based Sensor Network for Environmental Monitoring. Cooperative Design, Visualization, and Engineering, 276-279. doi:10.1007/978-3-642-04265-2_41Patwari, N., Ash, J. N., Kyperountas, S., Hero, A. O., Moses, R. L., & Correal, N. S. (2005). Locating the nodes: cooperative localization in wireless sensor networks. IEEE Signal Processing Magazine, 22(4), 54-69. doi:10.1109/msp.2005.1458287Conti, A., Guerra, M., Dardari, D., Decarli, N., & Win, M. Z. (2012). Network Experimentation for Cooperative Localization. IEEE Journal on Selected Areas in Communications, 30(2), 467-475. doi:10.1109/jsac.2012.120227Xuyu Wang, Hui Zhou, Shiwen Mao, Pandey, S., Agrawal, P., & Bevly, D. M. (2015). Mobility improves LMI-based cooperative indoor localization. 2015 IEEE Wireless Communications and Networking Conference (WCNC). doi:10.1109/wcnc.2015.7127811Cooperative Decision Making in a Stochastic Environment (No. urn: nbn: nl: ui: 12-76799)http://EconPapers.repec.org/RePEc:tiu:tiutis:a84d779a-d5a9-48e9-bfe7-46dea6f1de69Krishnan, P., Krishnakumar, A. S., Ju, W.-H., Mallows, C., & Gamt, S. (2004). A system for LEASE: Location estimation assisted by stationary emitters for indoor RF wireless networks. IEEE INFOCOM 2004. doi:10.1109/infcom.2004.1356987WANG, H., & Jia, F. (2007). A Hybrid Modeling for WLAN Positioning System. 2007 International Conference on Wireless Communications, Networking and Mobile Computing. doi:10.1109/wicom.2007.537Roos, T., Myllymäki, P., Tirri, H., Misikangas, P., & Sievänen, J. (2002). International Journal of Wireless Information Networks, 9(3), 155-164. doi:10.1023/a:1016003126882Xie, H., Tanin, E., & Kulik, L. (2007). Distributed Histograms for Processing Aggregate Data from Moving Objects. 2007 International Conference on Mobile Data Management. doi:10.1109/mdm.2007.30Krishnamachari, B., & Iyengar, S. (2004). Distributed Bayesian algorithms for fault-tolerant event region detection in wireless sensor networks. IEEE Transactions on Computers, 53(3), 241-250. doi:10.1109/tc.2004.1261832Nguyen, X., Jordan, M. I., & Sinopoli, B. (2005). A kernel-based learning approach to ad hoc sensor network localization. ACM Transactions on Sensor Networks, 1(1), 134-152. doi:10.1145/1077391.107739

Lowering Capital Costs when Evaluating Relief Systems - A Collaborative Approach

PresentationContinued uncertainty in future oil and gas prices has increased the sensitivity around energy related developments, leading to elevated levels of financial scrutiny. This is making owner- operators and Engineering, Procurement, and Construction (EPC) companies continue to look for smart options to increase their overall project delivery performance in order to maximize the Net Present Value (NPV). Lowering cost of design calls for a more collaborative approach to ensure an effective and prudent design of relief systems. The design of relief systems requires much more than just the proper sizing of the relief devices. During the concept phase of either Greenfield or Brownfield projects, assessing the basis for major relief systems and making clear recommendations to reduce the risks associated with each system has helped companies realize substantial safety and economic benefits. This presentation will give a typical breakdown of the collaborative workflow process for each of the entities involved in the project. Four distinct work activities are typically identified for such a project – development of preliminary overpressure protection, engineering design of relief systems, validation of the design, and validation of as-built documentation. At the end of each stage, the output from the independent analysis is compared with the contractor’s work and updates are performed before continuing to the next stage. This presentation will also give an overview of these stages, discuss the various steps, and the value-added benefit for each stage of the project

Sistematización de Información sobre Gestión de Recursos Hídricos y Cambio Climático en los departamentos de Matagalpa y Jinotega, 2012

El objetivo de la investigación fue sistematizar información que se ha generado de procesos de gestión del recursos hídrico que permita contar con una visión de conjunto de la realidad de nuestra región, de manera que en la dinámica actual y futura del desarrollo se busquen soluciones a los problemas de vulnerabilidad ante los impactos del cambio climático que conduzcan al desarrollo integral y disminuir el nivel de afectación en los ámbitos esenciales del diario vivir, siendo determinante la disponibilidad de agua en todas las actividades humanas y funcionamiento de todos los ecosistemas del planeta. Esta condición somete a prueba la capacidad investigativa, gestión y concertación para reponerse ante las situaciones más adversas relacionadas con los recursos hídricos y la variabilidad climática. La investigación se realizó a través de una inventarizacion, revisión y análisis de información que se ha generado de instituciones, organizaciones sociales y entidades competentes en la temática, la sistematización permitió identificar vacíos de conocimientos y de acciones para mejorar el manejo integral del recurso hídrico y adaptación a la variabilidad climática, la información es insuficiente y se encuentra desarticulada por lo cual se realizó propuesta estratégica como instrumento orientador para la toma de decisiones en la gestión institucional del recurso hídrico y en procesos de enseñanza aprendizaje de la educación superior en los departamentos de Matagalpa y Jinoteg

Elaboration of a multimedia book on the importance of statistics and presentation of the information for the statistical subjects taught at the FESC

[EN] Interactive digital book was produced on the topics importance of statistics and presentation of information, for the statistical subjects taught at the Faculty of Higher Studies Cuautitlán, the book was made with an interactive approach, that is, in most chapters there are HTML5 objects that students can access by connecting to the Internet from any mobile device or PC. The themes of this interactive book were statistics, variables and measurement levels, pie graph, bar graph, histogram, dot graph, stem and leaf graph, line graph and form. The interactive digital book contemplates that each chapter indicates prerequisites, learning objectives, written development of the topic in the form of questions and answers, videos with explanation, interactive exercises, widget (html 5, interactive galleries, interactive images, etc.) review questions, internet activities and resources.The interactive digital book will offer students a full-screen experience with galleries, videos, interactive diagrams, mathematical expressions and more, these books bring content to life in ways that a printed page cannot. Students will no longer be limited to static images illustrating traditional texts, but can now immerse themselves in an image with interactive captions, bringing an answer to life in a chapter review.They can flip through a book by simply sliding a finger on the screen. They can also highlight text, take notes, search for content, and find definitions in a glossary very easily. Plus, they can take them wherever they go, allowing students to learn not only within the classroom walls, but also in the virtual space that these books make up.Thanks to the PAPIME - 104420 project for the support in the realization of this work.Garcia, O.; Pineda, M.; Aguilar, A.; León, F. (2021). Elaboration of a multimedia book on the importance of statistics and presentation of the information for the statistical subjects taught at the FESC. En Proceedings INNODOCT/20. International Conference on Innovation, Documentation and Education. Editorial Universitat Politècnica de València. 103-110. https://doi.org/10.4995/INN2020.2020.11830OCS10311

Multivariate statistical technique over QoS variables to analyze video quality metrics on IEEE 802.11ac networks

[EN] We present the results from a measurementbasedperformance evaluation of wireless networks basedon IEEE 802.11ac standard in an indoor environment, withthe aim to analyze their performance under high definitionstreaming video applications. We focus our study on analyzingthe highest performance of these standards using off-theshelfequipment as well as the behavior of Quality of Servicevariables and how they affect to the video quality. Thus, wehave analyzed and measured these variables and have applieda multivariate statistical technique, called Factor Analysis,and finally discuss their behavior.This work was supported by the Universitat de Valencia under the projects UV-INV-PRECOMP14-207134, UVINVAE15-339582, by the Generalitat Valenciana under the project GV-2016-002 and by the Ministry of Economy under the project BIA2016-76957-C3-1-RGarcía-Pineda, M.; Felici-Castell, S.; Segura-Garcia, J. (2018). Multivariate statistical technique over QoS variables to analyze video quality metrics on IEEE 802.11ac networks. En XIII Jornadas de Ingeniería telemática (JITEL 2017). Libro de actas. Editorial Universitat Politècnica de València. 152-159. https://doi.org/10.4995/JITEL2017.2017.6572OCS15215

Soft, collinear and non-relativistic modes in radiative decays of very heavy quarkonium

We analyze the end-point region of the photon spectrum in semi-inclusive radiative decays of very heavy quarkonium (m alpha_s^2 >> Lambda_QCD). We discuss the interplay of the scales arising in the Soft-Collinear Effective Theory, m, m(1-z)^{1/2} and m(1-z) for z close to 1, with the scales of heavy quarkonium systems in the weak coupling regime, m, m alpha_s and m alpha_s^2. For 1-z \sim alpha_s^2 only collinear and (ultra)soft modes are seen to be relevant, but the recently discovered soft-collinear modes show up for 1-z << alpha_s^2. The S- and P-wave octet shape functions are calculated. When they are included in the analysis of the photon spectrum of the Upsilon (1S) system, the agreement with data in the end-point region becomes excellent. The NRQCD matrix elements and are also obtained.Comment: Revtex, 11 pages, 6 figures. Minor improvements and references added. Journal versio

Caracterización del ausentismo laboral de una IPS que presta servicios de consulta externa de medicina general, 2014

RESUMEN El ausentismo laboral genera un gran impacto económico en las empresas y a la sociedad en general. Es un problema difícil de manejar ya que es multifactorial, porque a pesar de que en su gran mayoría es generado por enfermedad general, al analizarlo se puede encontrar otros factores que conlleven a la ausencia del trabajador y con ello producir alteración al normal funcionamiento de la empresa, por lo que resulta indispensable estudiar este tema. Objetivo Caracterizar las principales causas de ausentismo laboral en los médicos generales de una IPS que presta servicios de consulta externa de medicina general a nivel nacional durante el año 2014. Materiales y Métodos: es un estudio de corte transversal sobre datos secundarios correspondientes al registro de incapacidades que presento la IPS durante el año 2014. Los criterios de inclusión fueron los médicos generales con los que contaba la IPS que presta servicios de salud a nivel nacional durante el año 2014 y los criterios de exclusión fueron las licencias de maternidad y paternidad. El tamaño de la muestra final fue de 202 médicos y el número de incapacidades que se presentó durante el año 2014 fue 313. Se realizó análisis de distribución de frecuencias, porcentaje y prevalencia de las incapacidades. Resultados: durante el año 2014 se presentaron 313 incapacidades, en una población de 202 médicos generales con prevalencia en las mujeres. El diagnóstico más frecuente de las incapacidades fue la categoría diagnostica “otros” en el cual se encuentra migraña, vértigo, alteraciones de la mama con 59 incapacidades, seguida por enfermedades gastrointestinales con 25 incapacidades. Conclusiones y recomendaciones: Las incapacidades fueron más frecuentes en mujeres que en hombres. El diagnóstico de las incapacidades más frecuente fue “enfermedad genérica o ausencia de diagnóstico”. La incapacidad más frecuente de un día que se presentaron 46 registros. El médico que mayor número de incapacidades presento fue de 18 para el año 2014. Se recomienda a la empresa tener un seguimiento de las incapacidades repetitivas, ya que estas podrían tener relación con enfermedad laboral que aún no ha sido calificada. Se recomienda complementar la base de datos con información como el antecedente de enfermedad crónica y el sedentarismo, lo que puede permitir realizar nuevos estudios respecto al riesgo cardiovascular de esta población.SUMMARY Absenteeism generates major economic impact on business and society in general. It is a difficult problem to manage since it is multifactorial, because although the vast majority is generated by general sickness, when analyzed can be found other factors that lead to the absence of the worker and thereby cause disruption to normal operation company, so it is essential to study this issue. Objective Characterize the main causes of absenteeism at a general practitioners serving IPS outpatient general medicine nationwide during 2014. Materials and Methods: a cross-sectional study on secondary data relating to registration of disabilities who introduced the IPS in 2014. Inclusion criteria were general practitioners with whom told the IPS that provides health services nationwide during 2014 and the exclusion criteria were the maternity and paternity licensing. The final sample size was 202 and the number of medical disabilities that occurred during 2014 was 313. Analysis of frequency distribution, percentage and prevalence of disabilities was conducted. Results: During the year 2014 313 disabilities were presented in a population of 202 general practitioners with prevalence in women. The most frequent diagnosis of disability was diagnosed category "others" which is migraine, dizziness, abnormal breast with disabilities 59, followed by gastrointestinal diseases with 25 disabilities. Conclusions and recommendations: Disabilities were more common in women than in men. The most frequent diagnosis of disability was "Generic illness or absence of diagnosis." The most frequent inability of a day that 46 records were submitted. The doctor who presented greater number of disabilities was 18 in 2014. It is recommended that the company keep track of repetitive disabilities, as these could be related to occupational disease that has not yet been rated. We recommend expanding the database with information such as a history of chronic disease and sedentary lifestyle, which may allow further studies regarding cardiovascular risk in this population