Materializing aaseline views for deviation detection exploratory OLAP

The final publication is available at link.springer.comAlert-raising and deviation detection in OLAP and explora-tory search concerns calling the user’s attention to variations and non-uniform data distributions, or directing the user to the most interesting exploration of the data. In this paper, we are interested in the ability of a data warehouse to monitor continuously new data, and to update accordingly a particular type of materialized views recording statistics, called baselines. It should be possible to detect deviations at various levels of aggregation, and baselines should be fully integrated into the database. We propose Multi-level Baseline Materialized Views (BMV), including the mechanisms to build, refresh and detect deviations. We also propose an incremental approach and formula for refreshing baselines efficiently. An experimental setup proves the concept and shows its efficiency.Peer ReviewedPostprint (author's final draft

Fiber-distributed Signal Processing: Where the Space Dimension Comes into Play

[EN] We implement "fiber-distributed signal processing" in the context of fiber-wireless communications by using different multicore fibers, providing both radio access distribution and microwave photonics signal processing in the same fiber medium.This research was supported by the ERC Consolidator Grant 724663, the Spanish Projects TEC2014-60378-C2-1-R, TEC2015-62520-ERC and TEC2016-80150-R, the Spanish scholarships MECD FPU13/04675 for J. Hervás and MINECO BES-2015-073359 for S. García, and Spanish MINECO Ramón y Cajal RYC-2014-16247 for I. GasullaGasulla Mestre, I.; García-Cortijo, S.; Barrera Vilar, D.; Hervás-Peralta, J.; Sales Maicas, S. (2017). Fiber-distributed Signal Processing: Where the Space Dimension Comes into Play. Optical Society of America (OSA). 1-3. https://doi.org/10.1364/PS.2017.PW1D.1S13Richardson, D. J., Fini, J. M., & Nelson, L. E. (2013). Space-division multiplexing in optical fibres. Nature Photonics, 7(5), 354-362. doi:10.1038/nphoton.2013.94Waterhouse, R., & Novack, D. (2015). Realizing 5G: Microwave Photonics for 5G Mobile Wireless Systems. IEEE Microwave Magazine, 16(8), 84-92. doi:10.1109/mmm.2015.2441593García, S., & Gasulla, I. (2016). Dispersion-engineered multicore fibers for distributed radiofrequency signal processing. Optics Express, 24(18), 20641. doi:10.1364/oe.24.020641Capmany, J., Mora, J., Gasulla, I., Sancho, J., Lloret, J., & Sales, S. (2013). Microwave Photonic Signal Processing. Journal of Lightwave Technology, 31(4), 571-586. doi:10.1109/jlt.2012.222234

Microwave Signal Processing over Multicore Fiber

[EN] We review the introduction of the space dimension into fiber-based technologies to implement compact and versatile signal processing solutions for microwave and millimeter wave signals. Built upon multicore fiber links and devices, this approach allows the realization of fiber-distributed signal processing in the context of fiber-wireless communications, providing both radiofrequency access distribution and signal processing in the same fiber medium. We present different space-division multiplexing architectures to implement tunable true time delay lines that can be applied to a variety of microwave photonics functionalities, such as signal filtering, radio beamsteering in phased array antennas or optoelectronic oscillation. In particular, this paper gathers our latest work on the following multicore fiber technologies: dispersion-engineered heterogeneous multicore fiber links for distributed tunable true time delay line operation; multicavity devices built upon the selective inscription of gratings in homogenous multicore fibers for compact true time delay line operation; and multicavity optoelectronic oscillation over both homogeneous and heterogeneous multicore fibers.This research was supported by the ERC Consolidator Grant 724663; the Spanish Projects TEC2015-62520-ERC, TEC2014-60378-C2-1-R and TEC2016-80150-R; the Valencian Research Excellency Award Program GVA PROMETEO 2013/012; the Spanish MECD FPU Scholarship (FPU13/04675) for J. Hervás; the Spanish scholarships MINECO BES-2015-073359 for S. García; and the Spanish MINECO Ramon y Cajal program RYC-2014-16247 for I. Gasulla.García Cortijo, S.; Barrera Vilar, D.; Hervás-Peralta, J.; Sales Maicas, S.; Gasulla Mestre, I. (2017). Microwave Signal Processing over Multicore Fiber. Photonics. 4(49):1-14. https://doi.org/10.3390/photonics404004911444

Outcome prediction with a social cognitive battery: a multicenter longitudinal study

The interest in social cognition in schizophrenia is justified by the relationship between deficits in these skills and negative functional outcomes. Although assessment batteries have already been described, there is no consensus about which measures are useful in predicting patient functioning or quality of life (QoL). We investigated a set of five measures of recognition of facial emotions, theory of mind (ToM), and empathy in a cohort of 143 patients with schizophrenia or schizoaffective disorder at inclusion and, amongst whom 79 were reassessed 1 year later. The distribution was satisfactory for the TREF (Facial Emotion Recognition Task), V-SIR (Versailles-Situational Intention Reading), and QCAE (Questionnaire of Cognitive and Affective Empathy). Internal consistency was satisfactory for the TREF, V-SIR, V-Comics (Versailles Intention Attribution Task), and QCAE. Sensitivity to change was acceptable for the TREF. The TREF and V-SIR showed a cross-sectional relationship with functioning beyond the clinical symptoms of schizophrenia but not beyond neurocognition. Moreover, the TREF and V-SIR at inclusion could not predict functioning one year later, whereas most neurocognitive and clinical dimensions at inclusion could. Finally, only affective QCAE showed a significant cross-sectional, but not longitudinal, association with QoL. In conclusion, the TREF had satisfactory psychometric properties and showed a cross-sectional, but not longitudinal, association with objective outcome measures, thus appearing to be reliable in clinical practice and research. The V-SIR also showed promising psychometric properties, despite a possible weakness to detect change. However, these measures should be interpreted within the context of the good predictive power of the neurocognitive and clinical status on the outcome.Sorbonne Universités à Paris pour l'Enseignement et la RechercheFondaMental-Cohorte

An Approach for Alert Raising in Real-Time Data Warehouses

National audienceThis work proposes an approach for alert raising within a real-timedata warehouse environment. It is based on the calculation of confidence intervalsfor measures from historical facts. As new facts arrive to the data warehouseon a real-time basis, they are systematically compared with their appropriateconfidence intervals and alerts are raised when anomalies are detected. The interestof this approach is illustrated using the particular real world use case oftechnical analysis of stock data

Materializing Baseline Views for Deviation Detection Exploratory OLAP

International audienceAlert-raising and deviation detection in OLAP and explora-tory search concern calling the attention of the user to variations andnon-uniform data distributions, or directing the user to the most in-teresting exploration of the data. In this paper, we are interested inthe ability of a data warehouse to monitor continuously new data andto update accordingly a particular type of materialized views recordingstatistics, called baselines. It should be possible to detect deviations atvarious levels of aggregation, and baselines should be fully integratedinto the database. We propose Multi-level Baseline Materialized Views(BMV), including the mechanisms for construction, refreshing and de-tecting deviation. We also propose an incremental approach and formulafor refreshing baselines eciently. An experimental setup proves the con-cept and shows its eciency

A Novel Modular Bioreactor to In Vitro Study the Hepatic Sinusoid

We describe a unique, versatile bioreactor consisting of two plates and a modified commercial porous membrane suitable for in vitro analysis of the liver sinusoid. The modular bioreactor allows i) excellent control of the cell seeding process; ii) cell culture under controlled shear stress stimulus, and; iii) individual analysis of each cell type upon completion of the experiment. The advantages of the bioreactor detailed here are derived from the modification of a commercial porous membrane with an elastomeric wall specifically moulded in order to define the cell culture area, to act as a gasket that will fit into the bioreactor, and to provide improved mechanical robustness. The device presented herein has been designed to simulate the in vivo organization of a liver sinusoid and tested by co-culturing endothelial cells (EC) and hepatic stellate cells (HSC). The results show both an optimal morphology of the endothelial cells as well as an improvement in the phenotype of stellate cells, most probably due to paracrine factors released from endothelial cells. This device is proposed as a versatile, easy-to-use co-culture system that can be applied to biomedical research of vascular systems, including the liver.This work was supported by: CSIC (PIE 201450E116) (RV); Instituto de Salud Carlos III (FIS PI11/00235) (JGS); Ministerio de Economía y Competitividad (SAF2012-31238) (CP); European Union (Fondos FEDER, ‘‘una manera de hacer Europa’’) (JGS and CP); European Community’s Seventh Framework Programme(ECFP7/2007-2013, grant agreement 229673) (JGS); CIBER-EHD (funded by Instituto de Salud Carlos III) (JGS and CP); and CIBER-BBN (funded by Instituto de Salud Carlos III) (RV). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewe