Bipartite field theories and D-brane instantons

We study D-brane instantons in systems of D3-branes at toric CY 3-fold singularities. The instanton effect can be described as a backreaction modifying the geometry of the mirror configuration, in which the breaking of U(1) symmetries by the instanton translates into the recombination of gauge D-branes, which also directly generates the instanton-induced charged field theory operator. In this paper we describe the D-brane instanton backreaction in terms of a combinatorial operation in the bipartite dimer diagram of the original theory. Interestingly, the resulting theory is a general Bipartite Field Theory (BFT), defined by a bipartite graph tiling a general (possibly higher-genus) Riemann surface. This provides the first string theory realization of such general BFTs. We study the general properties of the resulting theories, including the construction of the higher-dimensional toric diagrams and the interplay between backreaction and Seiberg duality. In cases where the non-perturbative effects relate to complex deformations, we show that the procedure reproduces and explains earlier existing combinatorial recipes. The combinatorial operation and its properties generalize to an operation on the class of general BFTs, even including boundaries, relating BFTs defined on Riemann surfaces of different genusThe work of S. F. is supported by the U.S. National Science Foundation grant PHY-1518967. He also gratefully acknowledges the Tsinghua Sanya International Mathematics Forum (TSIMF) for hosting the Workshop on SCFTs in Dimension 6 and Lower, where part of this project was carried out. E. G. and A. U. are partially supported by the grants FPA2015-65480-P from the MEIC/FEDER, the ERC Advanced Grant SPLE under contract ERC-2012-ADG-20120216-320421 and the grant SEV-2016-0597 of the "Centro de Excelencia Severo Ochoa" Programm

Development of a quantitative risk assessment of bovine viral diarrhea virus and bovine herpesvirus-1 introduction in dairy cattle herds to improve biosecurity

A quantitative risk assessment model was developed to estimate the annual probability of introducing bovine viral diarrhea virus (BVDV) and bovine herpesvirus 1 (BoHV-1) at the farm level through animal movements. Data from 2017 official animal movements, biosecurity questionnaires, scientific literature, and expert opinion from field veterinarians were taken into consideration for model input parameters. Purchasing or introducing cattle, rearing replacement heifers offsite, showing cattle at competitions, sharing transport vehicles with other herds, and transporting cattle in vehicles that have not been cleaned and disinfected were considered in the model. The annual probability of introducing BVDV or BoHV-1 through infected animals was very heterogeneous between farms. The median likelihoods of BVDV and BoHV-1introduction were 12 and 9%, respectively. Farms that purchased cattle from within their region (i.e., local movements) and shared transport with other farms had a higher probability for BVDV and BoHV-1 introduction. This model can be a useful tool to support decision-making on biosecurity measures that should be prioritized to reduce the probability of introduction of these 2 diseases in dairy herdsThis work was supported by a Grant from the Ministerio de Ciencia e Innovación of Spain (AGL2016-77269-C2-1-R and AGL2016-77269-C2-2-R). The Universidad de Nariño (Pasto, Colombia) provided funding to the first author (BBB)S

MOSS: Monitor de Operaciones de Sistemas SCADA

Este trabajo presenta una solución al monitoreo de las operaciones SCADA que se realizan en una planta industrial. Se efectúan operaciones de supervisión del estado de los dispositivos que operan en el sistema SCADA. La información recolectada se centraliza, se procesa y se informa, de manera que se puedan tomar acciones correctivas por parte del equipo de mantenimiento. Este sistema fue implementado en Aluar S.A.I.C. y gran parte de los requerimientos funcionales fueron solicitados por la empresa.Eje: Workshop Arquitectura, redes y sistemas operativos (WARSO)Red de Universidades con Carreras en Informática (RedUNCI

A validated fast algorithm for simulation of flooding events in plains

Hydrological modelling in large plains is not a straightforward task owing to the crucial influence of several elements, namely, accumulation of water on local depressions, absence of an integrated drainage network, generalized meagre surface slopes, strong sensitivity of the soil water content before rainfall events, and variation of the soil infiltration capacity with numerous transient and local factors. It would then appear that distributed hydrological models (DHM) are prone to produce better results than lumped-parameter models. The trade-off in setting up a DHM, however, is how realistic its results are as compared to its simplicity. This paper presents a physically based DHM, named AQUA, which can handle large domains discretized in squared cells of typically 80 m a side. In order to address properly the flow resistance, it relies on a relaxation parameter (α) with different values for the watercourses and the terrain. Likewise, an infiltration function (I) regulates the downward movement of water. Moreover, the model is supported by an adequate description of the gentle topographical features, which was achieved by a digital elevation model (DEM) from radar interferometry. The testing phase took into account the Santa Catalina Creek Basin (158 km2, centre Buenos Aires Province in Argentina). The results were quite encouraging, as the model was able to reproduce the effect of various rainfall scenarios. Sensitivity analyses of the model parameters were consistent with the actual simulation results. AQUA was tested against the well-known HEC-1 model, with a fairly good match of their results.Fil: Dalponte, Diego David. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Grupo de Plasmas Densos Magnetizados. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Grupo de Plasmas Densos Magnetizados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; ArgentinaFil: Rinaldi, Pablo Rafael. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Grupo de Plasmas Densos Magnetizados. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Grupo de Plasmas Densos Magnetizados; ArgentinaFil: Cazenave, Georgina. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff"; ArgentinaFil: Usunoff, Eduardo Jorge. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff"; ArgentinaFil: Vives, Luis Sebastián. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff"; ArgentinaFil: Varni, Marcelo Raúl. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff"; ArgentinaFil: Vénere, M.. Universidad Nacional del Centro de la Provincia de Buenos Aires; ArgentinaFil: Clausse, Alejandro. Universidad Nacional del Centro de la Provincia de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentin

Optimum cleaning schedule of photovoltaic systems based on levelised cost of energy and case study in central Mexico

In this paper, the soiling impact on photovoltaic systems in Aguascalientes, in central Mexico, an area where 1.4GWp of new photovoltaic capacity is being installed, is characterised experimentally. A soiling rate of -0.16 %/day in the dry season for optimally tilted crystalline silicon modules, and a stabilization of the soiling losses at 11.2% after 70 days of exposure were observed. With this data, a first of its kind novel method for determining optimum cleaning schedules is proposed based on minimising the levelised cost of energy. The method has the advantages compared to other existing methods of considering the system investment cost in the determination of the optimum cleaning schedule. Also, it does not depend on economic revenue data, which is often subject to uncertainty. The results show that residential and commercial systems should be cleaned once per year in Aguascalientes. On the other hand, cleaning intervals from 12 to 31 days in the dry season were estimated for utility-scale systems, due to the dramatic decrease of cleaning costs per unit photovoltaic capacity. We also present a comparative analysis of the existing criteria for optimising cleaning schedules applied to the same case study. The different methods give similar cleaning intervals for utility-scale systems and, thus, the choice of a suitable method depends on the availability of information

Pelvic exenterations for primary rectal cancer: analysis from a 10-year national prospective database

Aim: to identify short-term and oncologic outcomes of pelvic exenterations (PE) for locally advanced primary rectal cancer (LAPRC) in patients included in a national prospective database. Methods: few studies report on PE in patients with LAPRC. For this study, we included PE for LAPRC performed between 2006 and 2017, as available, from the Rectal Cancer Registry of the Spanish Association of Surgeons [Asociación Española de Cirujanos (AEC)]. Primary endpoints included procedure-associated complications, 5-year local recurrence (LR), disease-free survival (DFS) and overall survival (OS). A propensity-matched comparison with patients who underwent non-exenterative surgery for low rectal cancers was performed as a secondary endpoint. Results: eight-two patients were included. The mean age was 61.8 ± 11.5 years. More than half of the patients experienced at least one complication. Surgical site infections were the most common complication (abdominal wound 18.3%, perineal closure 19.4%). Thirty-three multivisceral resections were performed, including two hepatectomies and four metastasectomies. The long-term outcomes of the 64 patients operated on before 2013 were assessed. The five-year LR was 15.6%, the distant recurrence rate was 21.9%, and OS was 67.2%, with a mean survival of 43.8 mo. R+ve resection increased LR [hazard ratio (HR) = 5.58, 95%CI: 1.04-30.07, P = 0.04]. The quality of the mesorectum was associated with DFS. Perioperative complications were independent predictors of shorter survival (HR = 3.53, 95%CI: 1.12-10.94, P = 0.03). In the propensity-matched analysis, PE was associated with better quality of the specimen and tended to achieve lower LR with similar OS. Conclusion: PE is an extensive procedure, justified if disease-free margins can be obtained. Further studies should define indications, accreditation policy, and quality of life in LAPRC

Arquitecturas de Sistemas Embebidos de Tiempo-Real para Aplicaciones de Control

Este proyecto plantea el desarrollo de técnicas y mecanismos de planificación de tiempo real flexibles. Estos deben permitir adaptarse a las diferentes condiciones de trabajo de una aplicación, al mismo tiempo de minimizar el impacto en el resto de los requerimientos de diseño. Principalmente se abarcará la utilización de sistemas de tiempo real en aplicaciones de control y procesamiento de señales.Eje: Procesamiento de Señales y Sistemas de Tiempo RealRed de Universidades con Carreras en Informática (RedUNCI

Dairy farmers’ decision‐making to implement biosecurity measures: A study of psychosocial factors

Biosecurity measures are a set of management procedures that prevent the risk of introducing and spreading infectious diseases to a farm, although these measures are rarely implemented in dairy farms. There are some studies that have identified that the decision to implement biosecurity measures can be influenced by several psychosocial factors (attitudes and behaviours). Thus, the objective of this study was to examine the psychosocial factors (and their interactions) influencing the implementation of biosecurity measures in dairy farms in Spain, through the views of dairy farmers and veterinarians from Catalonia (northeast Spain) and Galicia (northwest Spain). Face‐to‐face in‐depth interviews were performed with 16 dairy farmers (nine from Catalonia and seven from Galicia) and 16 veterinarians (eight from Catalonia and eight from Galicia). Grounded theory analysis was performed on the transcripts, following the subtopics of: information sources, individual factors of the farmer, social dynamics, official veterinary services and other factors. The study identified the importance of veterinarians as a source of information, including their communication skills, the individual experiences of farmers, traditions of the farms and availability of time and space in the dairy farmer's decisions making. Further, it suggests the need to deepen the knowledge of the farm workers and the obligatory biosecurity measures. This research represents a starting point to develop future strategies to improve the implementation of biosecurity measures in dairy farmsThis research was supported by a grant from the Ministry of Economy and Competitiveness (MINECO) of Spain (AGL2016‐77269‐C2‐1‐R) and by European Regional Development Funds (ERDF). PhD studies of Moya, S., were funded by a grant from the National Commission for Scientific and Technological Research (CONICYT) of Chile and the Universitat Autònoma de Barcelona of Spain (B18P0040)S

Arquitecturas de Sistemas Embebidos de Tiempo-Real para Aplicaciones de Control

Este proyecto plantea el desarrollo de técnicas y mecanismos de planificación de tiempo real flexibles. Estos deben permitir adaptarse a las diferentes condiciones de trabajo de una aplicación, al mismo tiempo de minimizar el impacto en el resto de los requerimientos de diseño. Principalmente se abarcará la utilización de sistemas de tiempo real en aplicaciones de control y procesamiento de señales.Eje: Procesamiento de Señales y Sistemas de Tiempo RealRed de Universidades con Carreras en Informática (RedUNCI

Arquitecturas de Sistemas Embebidos de Tiempo-Real para Aplicaciones de Control

Este proyecto plantea el desarrollo de técnicas y mecanismos de planificación de tiempo real flexibles. Estos deben permitir adaptarse a las diferentes condiciones de trabajo de una aplicación, al mismo tiempo de minimizar el impacto en el resto de los requerimientos de diseño. Principalmente se abarcará la utilización de sistemas de tiempo real en aplicaciones de control y procesamiento de señales.Eje: Procesamiento de Señales y Sistemas de Tiempo RealRed de Universidades con Carreras en Informática (RedUNCI