Proxy re-encryption schemes for IoT and crowd sensing

IoT, crowd sensing and smart cities will be a traffic challenge. New communication paradigms as asynchronous messaging carry and forward, scheduled delivery and temporary storage will be needed to manage network resources dynamically. Since traditional end to end security will require keeping security associations among devices for a long time draining valuable resources, we propose and evaluate the use of proxy re-encryption protocols in these scenarios as a solution for reliable and flexible security

Rebels at War, Criminals in Peace: A Critical Approach to Violence in Colombia

This essay explores the meaning and significance of the Colombian peace agreements reached by Juan Manuel Santos’s government and the Revolutionary Armed Forces of Colombia—People’s Army (FARC-EP) on 24 November 2016 vis-à-vis a significant organizational shift within the national armed conflict and territorial dispute. By conducting a critical exposition of the armed conflict in Colombia, this essay contributes to the debate surrounding the (ex-)guerrillas’ demobilization and disarmament, highlighting the relevance of ideology for analyzing changes in the dynamics of violence in the so-called postconflict

Control y supervisión de un proceso hidráulico con una plataforma Scada

Una de las principales metas que se proponen las industrias es mejorar la calidad de sus procesos, y así mejorar los niveles de competencia, generando procesos más eficientes. La teoría de control permite obtener mejores parámetros de funcionamiento como lo son, por ejemplo un control de nivel y caudal exactos en los procesos de control de líquidos industriales. Esto se logra gracias a la aplicación de la teoría de control utilizando: Autómatas programables, Plataformas de programación con hardware Arduino, Sensores adecuados a las necesidades del sistema, Reguladores proporcionales de nivel, Software para la supervisión de procesos, como Wincc ofrecido por SIEMENS. Este proyecto consiste en conservar constante el nivel de líquido presente en un tanque, sin importar la cantidad de líquido evacuada de dicho tanque. El control sobre el proceso con la finalidad expuesta con anterioridad es logrado mediante la implementación de un controlador PID. Se aplica un interfaz hombre máquina (HMI) con el objeto de supervisar el proceso a través de réplicas gráficas del mismo

Neurodevelopment Outcome in Children with Fetal Growth Restriction at Six Years of Age: A Retrospective Cohort Study

Objective: This study aimed to describe neurodevelopment in fetal growth restriction children at the age of six. Secondly, we tried to demonstrate influencing factors that can improve or exacerbate this development, as well as predictive factors that might select a population at risk to assist with early childhood support. Method: It was a study of 70 children affected with FGR. FGR was based on these definitions: birth weight below the 3rd percentile or birth weight below the 10th percentile with an abnormal hemodynamic Doppler study. Neurodevelopment was assessed at 6 years old by means of Batelle Development Inventory. A global development quotient under a 100 score was considered a neurodevelopment delay. All variables regarding pregnancy care, delivery episode, postpartum, neonatal care, sociodemographic issues, and the need for support in the first years were studied. Results: The mean gestational age at diagnosis was 33.14 weeks (standard deviation (SD = 4.31), with 32.9% of early-onset diagnoses. The mean gestational age at delivery was 35.61 (SD = 3.21), and the cesarean rate was 64.3%. The average age of the children at the moment of the evaluation was 76.20-month-old (SD = 3.70). The mean global development quotient was 97.28 (SD = 13.97). We were able to record a 57.1% of global development delay. In the cases of cognition, only 17.1% of the children registered a delay. Motor and communication skills were the most frequently affected. We discovered that socioeconomic status was positively related to the global development quotient, as well as both gestational age at delivery and middle cerebral artery pulsatility index was positively related to the global development quotient. Conclusions: We found a higher neurodevelopment delay rate (57.1%). We could relate a higher gestational age at delivery and a higher MCA percentile with better global neurodevelopment quotientsBenítez Marín MJ, Blanco Elena JA, Marín Clavijo J, Jiménez López J, Lubián López DM, González Mesa E. Neurodevelopment Outcome in Children with Fetal Growth Restriction at Six Years of Age: A Retrospective Cohort Study. International Journal of Environmental Research and Public Health. 2022; 19(17):11043. https://doi.org/10.3390/ijerph19171104

Spanish innovation strategic plan. Analysis of its instruments, impact and results

[EN] The purpose of this piece of research is to analize public instruments implemented to promote innovation in Spain and the results that were obtained among Spanish innovative companies. Along this paper, the National Innovation Strategy for Science, Technology and Innovation 2013-2020, and its impact, prior to the implementation of the next plan that will cover the period 2021-2027, have been analysed. This piece of research sheds light on the main weaknesses identified in the National Innovation Strategy for Science, Technology and Innovation 2021-2027, and particularly how and where it fails in boosting innovation in Spain. The main conclusions are useful for all involved parts, politicians as part of the public sector (Government), industry and academia as fundamental pillar of the Spanish innovation system.Catalá-Pérez, D.; Carrascosa López, CE.; Perelló Marín, MR. (2022). Spanish innovation strategic plan. Analysis of its instruments, impact and results. En Proceedings 3rd International Conference. Business Meets Technology. Editorial Universitat Politècnica de València. 3-15. https://doi.org/10.4995/BMT2021.2021.1373031

Distributed access control and privacy for the internet of me

This article presents an experimental scalable message driven IoT and its security architecture based on Decentralized Information Flow Control. The system uses a gateway that exports SoA (REST) interfaces to the internet simplifying external applications whereas uses DIFC and asynchronous messaging within the home environment

Metodología para estimación de series de tiempo en bonos : observación de volatilidad en bonos de deuda pública colombianos (TES)

La aplicación de metodologías de series de tiempo para el precio de un bono resulta un proceso complejo debido a sus características financieras y matemáticas. En específico, el pago de cupones y el efecto de la duración modificada hacen que los precios (limpio o sucio) no puedan ser usados correctamente para aplicaciones de series de tiempo. La comunidad académica ha propuesto diversas metodologías que pueden ser aplicadas para disminuir el sesgo en las estimaciones de volatilidad que presentan los bonos. Es necesario evaluar las ventajas y desventajas de cada una de ellas, y analizar las características que debe cumplir la serie de tiempo. En el presente trabajo se propone una metodología novedosa para estimar una serie de tiempo que permita ser usada para modelar adecuadamente los precios de los bonos de deuda pública colombiana, observando su implementación en la estimación de volatilidad.The application of time series methodologies in bond prices turns out to be a complex process due to its mathematical and financial characteristics. In particular, the coupon payment and the modified duration effect makes prices (clean and dirty) unable to be used correctly in time series applications. Academic community has proposed many different methodologies that could be applied to reduce the bias when estimating volatility on bond prices. It’s necessary to evaluate advantages and disadvantages on each of them, and analyze the characteristics that must have the time series. The investigation aims to propose a new methodology to estimate a time series that allow the modeling of Colombian public debt bond prices, observing its implementation in the volatility estimation

Home monitoring for older singles: A gas sensor array system

Many residential environments have been equipped with sensing technologies both to provide assistance to older people who have opted for aging-in-place and to provide information to caregivers and family. However, such technologies are often accompanied by physical discomfort, privacy concerns, and complexity of use. We explored the feasibility of monitoring home activity using chemical sensors that pose fewer privacy concerns than, for example, video-cameras and which do not suffer from blind spots. We built a monitoring device that integrates a sensor array and IoT capabilities to gather the necessary data about a resident in his/her living space. Over a period of 3 months, we uninterruptedly measured the living space of a typical elder person living on his/her own. To record the level of activity during the same period and obtain a ground truth for the activity, a set of motion sensors were also deployed in the house. Home activity was extracted from a PCA space moving-window which translated sensor data into the event space; this also compensated for environmental and sensor drift. Our results show that it is possible to monitor the person’s home activity and detect sudden deviations from it using a low-cost, non-invasive, system based on gas sensors that gather data on the air composition in the living space. We made the dataset publicly available at https://archive.ics.uci.edu/ml/index.php2.This work was supported by the Spanish Ministry of Economy and Competitiveness (www.mineco.gob.es) PID2021-122952OB-I00, DPI2017-89827-R, Networking Biomedical Research Centre in the subject area of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), initiatives of Instituto de Investigación Carlos III (ISCIII), Share4Rare project (Grant Agreement 780262), ISCIII (grant AC22/00035), ACCIÓ (grant Innotec ACE014/20/000018) and Pla de Doctorats Industrials de la Secretaria d’Universitats i Recerca del Departament d’Empresa i Coneixement de la Generalitat de Catalunya (2022 DI 014), and the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie (grant No. 101029808). JF also acknowledges the CERCA Program/Generalitat de Catalunya and the Serra Húnter Program. B2SLab is certified as 2017 SGR 952.Peer ReviewedPostprint (author's final draft