Optical Supersymmetry in the Time Domain

Originally emerged within the context of string and quantum field theory, and later fruitfully extrapolated to photonics, the algebraic transformations of quantum-mechanical supersymmetry were conceived in the space realm. Here, we introduce a paradigm shift, demonstrating that Maxwell's equations also possess an underlying supersymmetry in the time domain. As a result, we obtain a simple analytic relation between the scattering coefficients of a large variety of time-varying optical systems and uncover a wide new class of reflectionless, three dimensional, all-dielectric, isotropic, omnidirectional, polarization-independent, non-complex media. Temporal supersymmetry is also shown to arise in dispersive media supporting temporal bound states, which allows engineering their momentum spectra and dispersive properties. These unprecedented features define a promising design platform for free-space and integrated photonics, enabling the creation of a number of novel reconfigurable reflectionless devices, such as frequency-selective, polarization-independent and omnidirectional invisible materials, compact frequency-independent phase shifters, broadband isolators, and versatile pulse-shape transformers

Impacto de la regulación en la eficiencia asignativa del mercado spot eléctrico colombiano

Este paper utilizando un modelo de regresión con estructura ARCH, analiza el efecto de la implementación de algunas medidas regulatorias y de variables fundamentales (relación entre la demanda comercial y la disponibilidad real, El Niño y los aportes hidrológicos) en el Mercado de Energía Mayorista en Colombia sobre el precio spot. Los resultados obtenidos evidencian que las regulaciones establecidas por la Comisión de Regulación de Energía y Gas, han impactado estadística y significativamente el precio spot. Además, El Niño y los aportes hidrológicos presentan un impacto positivo y negativo, respectivamente sobre el precio spot, debido a la gran participación hidráulica de este mercado.This paper uses an ARCH regression model to analyze the effect of several regulatory measures and fundamental factors (the relationship between commercial demand and real availability, El Niño, and water supplies) on the spot price in the Colombian wholesale power market. The results indicate that the regulations established by the Electricity and Gas Regulatory Commission have had a substantial and statistically-significant effect on spot prices. In addition, El Niño and hydro supplies have a positive and negative respectively effect on the spot price, due to the large share of hydropower in this market

GOYA: a teleoperated system for blasting applied to ships maintenance

This paper presents the GOYA Project, a teleoperated system for blasting applied to hull cleaning in ship maintenance. The objective of the project is to develop a reliable and cost effective technology regarding hull grit blasting, obtaining a high quality surface preparation together with a dramatic reduction of waste and zero emissions to environment. Present technology for hull cleaning and the problematic in shipbuilding industry are analysed. Selection of blasting technologies and materials is also approached in this paper, showing the different tests carried out to achieve a hull surface cleanliness of SA 2 ½. The desing of the robot is also presented, showing aspects of mechanical, control unit, teleoperation system and blasting head design. It also shows the consecution of a smooth hull surface and the reduction of operation costs atmospheric contamination. It also eliminates the hard working conditions of the operators in the present manual operation. This work is supported by the Spanish government and the European Union (CICYT-FEDER) and is tested in BAZAN Co.The authors want to acknowledge the Spanish government and European Communities for CICYT-FEDER support (1FD97-0823). Additional funds support from BAZAN and Spanish Ministry of Industry (ATYCA)

Neurosciences applied to organizations: a construction that has been developing from praxis

En la última década se ha dado un desarrollo importante de estudios que acogen lógicas interdisciplinarias y multidisciplinarias para explicar y comprender diferentes fenómenos, oportunidades y nuevas formas de accionar las estrategias organizacionales en la fuerza laboral. No obstante, son escasas las investigaciones que buscan validar el constructo de las neurociencias aplicadas a las organizaciones

An Extensive Validation of a SIR Epidemic Model to Study the Propagation of Jamming Attacks against IoT Wireless Networks.

This paper describes the utilization of an epidemic approach to study the propagation of jamming attacks, which can affect to different communication layers of all nodes in a variety of Internet of Things (IoT) wireless networks, regardless of the complexity and computing power of the devices. The jamming term considers both the more classical approach of interfering signals focusing on the physical level of the systems, and the cybersecurity approach that includes the attacks generated in upper layers like Medium Access Control (MAC), producing the same effect on the communication channel. In order to study the accuracy of the proposed epidemic model to estimate the propagation of jamming attacks, this paper uses the results of public simulations and experiments. It is of special interest the data obtained from experiments based on protocols such as Multi-Parent Hierarchical Protocol (MPH), Ad-hoc On-demand Distance Vector (AODV), and Dynamic Source Routing (DSR), working over the IEEE 802.15.4 standard. Then, using the formulation of the deterministic epidemiological model Susceptible–Infected–Recovered (SIR), together the abovementioned simulation, it has been seen that the proposed epidemic model could be used to estimate in that kind of IoT networks, the impact of the jamming attack in terms of attack severity and attack persistenceThis research has been partially supported by Ministerio de Economía, Industria y Competitividad (MINECO), Agencia Estatal de Investigación (AEI), and Fondo Europeo de Desarrollo Regional (FEDER, UE) under projects TIN2017-84844-C2-1-R and PGC2018-098813-B-C32

Towards a framework for inter-enterprise architecture to boost collaborative networks

A complete Inter-Enterprise Architecture should be conformed to a framework, a methodology and a modelling language. In this sense, this paper proposes an initial Framework for Inter-Enterprise Architecture (FIEA), which organizes, stores, classifies and communicates in a conceptual level the elements of the Inter-Enterprise Architecture (IEA) and their relationships, ensuring their consistency and integrity. This FIEA provides a clear picture about the elements and perspectives that make up the collaborative network and their inter-relationships, supported for technology base on the Internet for its inter-operation.This research has been carried out for the project “Sistema de ayuda a la toma de decisiones ante decisiones no programadas en la planificación jerárquica de la producción (ADENPRO-PJP)” Ref. SP20120703 Universitat Politècnica de València.Vargas, A.; Boza García, A.; Cuenca, L.; Ortiz Bas, Á. (2013). Towards a framework for inter-enterprise architecture to boost collaborative networks. En On the Move to Meaningful Internet Systems: OTM 2013 Workshop. Springer Verlag (Germany). 179-188. https://doi.org/10.1007/978-3-642-41033-8_26S179188Cuenca, L., Boza, A., Ortiz, A.: Enterprise Architecture Framework with Early Business/ICT Alignment for Extended Enterprises. In: Ortiz, Á., Franco, R.D., Gasquet, P.G. (eds.) BASYS 2010. IFIP AICT, vol. 322, pp. 11–18. Springer, Heidelberg (2010a)Vargas, A., Boza, A., Cuenca, L., Sacala, I.: Inter-Enterprise Architecture and Internet of the Future. In: Camarinha-Matos, L.M., Tomic, S., Graça, P. (eds.) DoCEIS 2013. IFIP AICT, vol. 394, pp. 25–32. Springer, Heidelberg (2013)Camarinha-Matos, L., Afsarmanesh, H.: Collaborative networks: Reference Modeling. Media, Springer Science + Business (2008)European Commission European Society and Media: Dygital Business Ecosystems. Office for Official Publications of the European Communities, Luxembourg (2007)Future Internet Enterprise Systems (FInES) Cluster: FInES Research Roadmap 2025, http://cordis.europa.eu/Vargas, A., Boza, A., Cuenca, L., Ortiz, A.: The importance of strategic alignment in enterprise collaboration. In: Prado-Prado, J.C. (ed.) Annals of Industrial Engineering 2012, pp. 1–8. Springer, London (2013)Henderson, J., Venkatraman, N.: Strategic alignment: Leveraging information technology for transforming organizations. IBM Systems Journal 32(1), 472–484 (1993)Vargas, A., Boza, A., Cuenca, L.: Lograr la alineación estratégica de negocio y las tecnologías de la información a través de Arquitecturas Empresariales: Revisión de la Literatura. In: XV Congreso de Ingeniería de Organización, Cartagena-España, pp. 1061–1070 (2011a)ISO 15704: Industrial automation systems - Requirements for enterprise-reference architectures and methodologies (2000)Kosanke, K.: CIMOSA Primer on key concepts, purpose and business value. CIMOSA Association, http://cimosa.cnt.pl/Cuenca, L., Boza, A., Ortiz, A.: An enterprise engineering approach for the alignment of business and information technology strategy. International Journal of Computer Integrated Manufacturing 24(11), 974–992 (2011)Vernadat, F.: Enterprise modelling and integration: From fact modelling to Enterprise Interoperability (2003)Vargas, A., Boza, A., Cuenca, L.: Towards Interoperability Through Inter-Enterprise Collaboration Architectures. In: Meersman, R., Dillon, T., Herrero, P. (eds.) OTM-WS 2011. LNCS, vol. 7046, pp. 102–111. Springer, Heidelberg (2011)Plaza, J., Burgos, J., Carmona, E.: Measuring Stakeholder Integration: Knowledge, Interaction and Adaptational Behavior Dimensions. Journal of Business Ethics 93, 419–442 (2010)Camarinha-Matos, L.M., Afsarmanesh, H.: Collaborative networks: A new scientific discipline, pp. 439–452 (2005)Afsarmanesh, H., Msanjila, S.: Inter-organizational trust in VBEs. In: Camarinha-Matos, L.M., Afsarmanesh, H., Ollus, M. (eds.) Methods and Tools for Collaborative Networked Organizations. Springer (2008)Mehandjiev, N., Grefen, P.: Dynamic business process formation for instant virtual enterprises, London (2010)Kosanke, K., Vernadat, F., Zelm, M.: CIMOSA: enterprise engineering and integration. Computers in Industry 40, 83–97 (1999)Chen, D., Vallespir, B., Doumeingts, G.: GRAI integrated methodology and its mapping onto generic enterprise reference architecture and methodology. Computers in Industry 33, 387–394 (1997)IFIP: GERAM: Generalised Enterprise Reference Architecture and Methodology. In: International Federation for Information Processing, http://dl.ifip.org/index.php/index/indexOrtiz, A., Lario, F., Ros, L.: Enterprise Integration—Business Processes Integrated Management: a proposal for a methodology to develop Enterprise Integration Programs. Computers in Industry 40, 155–171 (1999)Cuenca, L., Ortiz, A., Boza, A.: Business and IS/IT strategic alignment framework. In: Camarinha-Matos, L.M., Pereira, P., Ribeiro, L. (eds.) DoCEIS 2010. IFIP AICT, vol. 314, pp. 24–31. Springer, Heidelberg (2010b)THE OPEN GROUP: TOGAF, http://www.opengroup.org/togaf/Vesterager, J., T{\o}lle, M., Bernus, P.: VERA: Virtual Enterprise Reference Architecture. In: GMNBook, GLOBEMEN Final Plenary (2002)Chalmeta, R., Grangel, R.: ARDIN extension for virtual enterprise integration. The Journal of Systems and Software 67 (2003

Discourse analysis of the debate on hydroelectric dam builiding in Brazil

In recent years new hydroelectric dam projects in Brazil have led to intense debate across society. A range of different social actors have been engaged in these controversies, all of them deploying different discourses to legitimise their postures. This paper addresses the study of the discourses emerging around this debate in the case of two hydroelectric projects in the Cuenca del Alto Paraná River, and examines the way the multiple arguments emanating from the social actors are grouped together. On the basis of a content analysis of qualitative interviews a factor analysis was carried out to identify the groups of arguments. One of the main outcomes of this analysis highlighted the discursive isolation of a single social group – the people affected by the construction of the dams – in contrast to the other actors, who shared arguments grounded in techno-economic rationales. As opposed to this, those affected by the dam projects used arguments based on their emotions, identities and daily experiences of place; their perspectives were absent from the discourses of other actors

Ensembles of Deep Learning Architectures for the Early Diagnosis of the Alzheimer’s Disease.

Computer Aided Diagnosis (CAD) constitutes an important tool for the early diagnosis of Alzheimer’s Disease (AD), which, in turn, allows the application of treatments that can be simpler and more likely to be effective. This paper explores the construction of classification methods based on deep learning architectures applied on brain regions defined by the Automated Anatomical Labeling (AAL). Gray Matter (GM) images from each brain area have been split into 3D patches according to the regions defined by the AAL atlas and these patches are used to train different deep belief networks. An ensemble of deep belief networks is then composed where the final prediction is determined by a voting scheme. Two deep learning based structures and four different voting schemes are implemented and compared, giving as a result a potent classification architecture where discriminative features are computed in an unsupervised fashion. The resulting method has been evaluated using a large dataset from the Alzheimer’s disease Neuroimaging Initiative (ADNI). Classification results assessed by cross-validation prove that the proposed method is not only valid for differentiate between controls (NC) and AD images, but it also provides good performances when tested for the more challenging case of classifying Mild Cognitive Impairment (MCI) Subjects. In particular, the classification architecture provides accuracy values up to 0.90 and AUC of 0.95 for NC/AD classification, 0.84 and AUC of 0.91 for stable MCI/AD classification and 0.83 and AUC of 0.95 for NC/MCI converters classification.This work was partly supported by the MICINN un der the projects TEC2012-34306 and PSI2015-65848- R, and the Consejer´ıa de Innovaci´on, Ciencia y Em presa (Junta de Andaluc´ıa, Spain) under the Ex cellence Projects P09-TIC-4530, P11-TIC-7103 and the Universidad de M´alaga. Programa de fortalec imiento de las capacidades de I+D+I en las Uni versidades 2014-2015, de la Consejer´ıa de Econom´ıa, Innovaci´on, Ciencia y Empleo, cofinanciado por el fondo europeo de desarrollo regional (FEDER) un der the project FC14-SAF30. Data collection and sharing for this project was funded by the Alzheimer’s Disease Neuroimaging Ini tiative (ADNI) (National Institutes of Health Grant U01 AG024904) and DOD ADNI (Department of Defense award number W81XWH-12-2-0012). ADNI is funded by the National Institute on Aging, the National Institute of Biomedical Imaging and Bio engineering, and through generous contributions from the following: AbbVie, Alzheimer’s Associa tion; Alzheimer’s Drug Discovery Foundation; Ara clon Biotech; BioClinica, Inc.; Biogen; Bristol-Myers Squibb Company; CereSpir, Inc.; Eisai Inc.; Elan Pharmaceuticals, Inc.; Eli Lilly and Company; Eu roImmun; F. Hoffmann-La Roche Ltd and its affili ated company Genentech, Inc.; Fujirebio; GE Health care; IXICO Ltd.; Janssen Alzheimer Immunother apy Research & Development, LLC.;Johnson & Johnson Pharmaceutical Research & Development LLC.; Lumosity ; Lundbeck; Merck & Co., Inc.; Meso Scale Diagnostics, LLC.; NeuroRx Research; Neurotrack Technologies; Novartis Pharmaceuticals Corporation; Pfizer Inc.; Piramal Imaging; Servier; Takeda Pharmaceutical Company; and Transition Therapeutics. The Canadian Institutes of Health Re search is providing funds to support ADNI clinical sites in Canada. Private sector contributions are fa cilitated by the Foundation for the National Insti tutes of Health (www.fnih.org). The grantee organi zation is the Northern California Institute for Re search and Education, and the study is coordinated by the Alzheimer’s Disease Cooperative Study at the University of California, San Diego. ADNI data are disseminated by the Laboratory for Neuro Imaging at the University of Southern California

Use Performance and Management of Biodegradable Fluids as Transformer Insulation

In recent years, the use of biodegradable fluids as liquid insulation for distribution and power transformers is spreading. The main biodegradable fluids used are natural and synthetic esters, although biodegradable hydrocarbons have been recently proposed. Biodegradable fluids have a much lower environmental impact than mineral oil, limiting the risk of soil contamination in leaks, which makes them a suitable solution for applications such as offshore transformers or railway transformers. Additionally, these fluids have a higher flash point than conventional mineral oils, which dramatically reduces the risk of fire and collateral damage derived from explosion and fire. Despite these advantageous factors, there are still some aspects that hinder the broadening of their use, such as the difference in thermal properties or the lack of accepted maintenance procedures for transformers that use them as liquid insulation. This paper presents the current status of biodegradable insulating fluids, analyzing some of their properties and discussing the aspects that are still to be investigated in order to make them a real alternative to petroleum-based fluids.Part of the work was performed during secondments and short visits between University of Valle, University Carlos III of Madrid and University of Cantabria executed in the framework of the BIOTRAFO project “Raising knowledge and developing technology for the design and deployment of high-performance power transformers immersed in biodegradable fluids”, H2020-MSCA-RISE-2018- 823969, 2019-21. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 823969. Also, we acknowledge the support of the Spanish Ministry of Science and Innovation by means of the National Research Project Asset management of biodegradable-fluid-based transformers (PID2019-107126RB-C21/AEI/10.13039/501100011033 and PID2019-107126RB-C22/AEI/ 10.13039/501100011033)

Revisión narrativa: Posibles efectos de la dieta cetogénica en el desarrollo del tejido tumoral en pacientes con cáncer

La presente investigación pretende hacer una contextualización de la literatura con base en los efectos de la dieta cetogénica (DC) en el metabolismo tumoral de los pacientes diagnosticados con cáncer. La necesidad de establecer alternativas terapéuticas para el cáncer, ha llevado a la ciencia a incluir la DC en su agenda investigativa debido a su fundamento bioquímico con el cual se cree que se puede retrasar el crecimiento tumoral y la tumor-génesis. El interés por conocer los posibles efectos de la DC en el tejido tumoral, surge con la necesidad de saber qué se ha descrito por la ciencia durante los últimos años sobre este tema, permitiendo identificar por medio de estudios e investigaciones, la relación existente entre la dieta cetogénica y el tejido tumoral en pacientes con cáncer.This research aims to contextualize the literature based on the effects of the ketogenic diet (DC) on tumor metabolism in patients diagnosed with cancer. The need to establish therapeutic alternatives for cancer has led science to include CD in its research agenda due to its biochemical basis with which it is believed that tumor growth and tumor genesis can be delayed. The interest in knowing the possible effects of CD on tumour tissue arises from the need to know what has been described by science over the last few years on this subject, making it possible to identify, through studies and research, the relationship between the ketogenic diet and tumour tissue in cancer patients