Anomaly detection prototype for log-based predictive maintenance at INFN-CNAF tier-1

Splitting the evolution of HEP from the one of computational resources needed to perform analyses is, nowadays, not possible. Each year, in fact, LHC produces dozens of PetaBytes of data (e.g. collision data, particle simulation, metadata etc.) that need orchestrated computing resources for storage, computational power and high throughput networks to connect centers. As a consequence of the LHC upgrade, the Luminosity of the experiment will increase by a factor of 10 over its originally designed value, entailing a non negligible technical challenge at computing centers: it is expected, in fact, an uprising in the amount of data produced and processed by the experiment. With this in mind, the HEP Software Foundation took action and released a road-map document describing the actions needed to prepare the computational infrastructure to support the upgrade. As a part of this collective effort, involving all computing centres of the Grid, INFN-CNAF has set a preliminary study towards the development of AI driven maintenance paradigm. As a contribution to this preparatory study, this master thesis presents an original software prototype that has been developed to handle the task of identifying critical activity time windows of a specific service (StoRM). Moreover, the prototype explores the viability of a content extraction via Text Processing techniques, applying such strategies to messages belonging to anomalous time windows

Root Mean Square of the Successive Differences as Marker of the Parasympathetic System and Difference in the Outcome after ANS Stimulation

The autonomic nervous system has a huge impact on the cardiac regulatory mechanism, and many markers exist for evaluating it. In this chapter we are going to focus on the RMSSD (Root mean square of successive differences), considered the most precise marker for the parasympathetic effector on the heart. Before is necessary to learn what the Heart Rate Variability is and how it works, which type of range of HRV exists and how we can measure it. Finally, there will be a presentation of how the RMSSD can be used in different field, and how and why the outcome can change and what does it mean

Pseudolus, un doppio gioco onomastico. Alcune considerazioni sul lessico dell’inganno in Plauto

The word dolus recurs very often in this play: this appears to support Pascucci’s view on the name Pseudolus as a nomen agentis, in which -olus did not evolve into -ulus for the very sake of a word play with dolus

Polyamine–Drug Conjugates: Do They Boost Drug Activity?

Over the past two decades, the strategy of conjugating polyamine tails with bioactive molecules such as anticancer and antimicrobial agents, as well as antioxidant and neuroprotective scaffolds, has been widely exploited to enhance their pharmacological profile. Polyamine transport is elevated in many pathological conditions, suggesting that the polyamine portion could improve cellular and subcellular uptake of the conjugate via the polyamine transporter system. In this review, we have presented a glimpse on the polyamine conjugate scenario, classified by therapeutic area, of the last decade with the aim of highlighting achievements and fostering future developments

Mídia programática: o impacto das novas técnicas de comercialização publicitária na experiência personare

A publicidade é historicamente interligada aos meios de comunicação. A partir da digitalização das mídias e da popularização da Internet, a indústria midiática descobre novas possibilidades de personalização da mensagem publicitária, a partir da automação dos sistemas e melhor aproveitamento sobre o histórico de dados de usuários em rede. Hoje pode-se programar anúncios de acordo com informações acerca do comportamento de consumidores baseadas em seus padrões individuais de atividades na Internet. Anunciantes e agências encontram novas maneiras de veicular anúncios em âmbito digital. Desse modo, surge a mídia programática. O presente estudo tem como objetivo primário entender o fenômeno da mídia programática, e os possíveis reflexos nos novos modelos de negócios publicitários. Debate-se aqui um processo em que se utiliza dados do usuário armazenados em redes para promover impactos da mensagem publicitária personalizados como o ponto central desta atividade. Para tal, adotaram-se, em primeira instância uma revisão bibliográfica embasada numa literatura contemporânea sobre a temática e, posteriormente, uma pesquisa de observação através de um experimento de veiculação de campanha distribuída em dois grupos: G0, controle; e GT, ao qual foram aplicados critérios de segmentação utilizando dados dos usuários. Com base nos resultados obtidos, foi possível verificar uma diferença positiva e significante estatisticamente de GT em comparação à G0. Este resultado sugere, possivelmente, uma maior assertividade em campanhas publicitárias, contudo estudos futuros acerca do assunto devem ser realizados

Exciton dynamics in hybrid polymer/QD blends

Abstract The prospect of exploiting quantum dots (QDs) properties (tunable absorption spectrum, multiple exciton generation) while maintaining the flexible structure of polymer systems opens new possibilities in the photovoltaic field. Although charge transport dynamics in pristine polymer and QDs systems have been quite well established lately, a complete understanding of the charge transfer process between QDs and polymers when they are in blends is still lacking. In this work we used static and ultrafast fluorescence spectroscopy together with Atomic force Microscopy (AFM) to study the exciton dynamics in polymer/QDs films. Specifically we used poly(3-hexylthiophene) (P3HT) as the hole conducting donor material and the core shell CdSe(ZnS) QDs as the electron acceptor material. The QDs surface has been treated with two different capping ligands treatments: one based on the use of pyridine and the other one on hexanoic acid. The influence of the two different methods on the exciton dynamics and on the morphology will also be discussed. Blends containing differently treated P3HT/CdSe(ZnS) wt% ratios have been prepared producing films having uniform morphology and good intermixing, as proved by AFM measurements. Ultrafast fluorescence decays allowed us to compare the exciton dynamics in the polymer pristine respect to the treated P3HT/CdSe(ZnS) films. Efficient fluorescence quenching has been shown by both kind of blends respect to the pure polymer

RF-powered UHF-RFID analog sensors platform

An RF powered UHF-RFID passive sensors platform was realized using discrete components and printed antennas designed to resonate at 868 MHz, used both for energy harvesting and data transmission. The tests demonstrate the possibility for the system to operate autonomously within the reading range of a standard RFID reader, that acts both as the RF power source and the receiver of the data stored in the tag user memory. The microcontroller can be interfaced on the same substrate with a sensor made of polymeric materials, sensible to physical parameters or chemical agents. RF-powered UHF-RFID analog sensors platform (PDF Download Available). Available from: http://www.researchgate.net/publication/279193365_RF-powered_UHF-RFID_analog_sensors_platform [accessed Sep 14, 2015]

Predominance of CTX-M–type extended-spectrum β-lactamase genes among enterobacterial isolates from outpatients in Brazil

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Optical properties of polystyrene-ZnO nanocomposite scattering layer to improve light extraction in organic light-emitting diode

In this work, experimental measurements on polystyrene-ZnO nanocomposite scattering films and on organic light-emitting device with and without the scattering layers are presented. The results are also compared with Henyey-Greenstein radiative-transfer model to narrow down the parameters that can be important in the identification of more suitable scattering layers. As a result, an increase of efficiency of about 30% has been obtained that it can be translated in 60% of outcoupled light in respect to the total generated amount