Exploració per autor "Berral García, Josep Lluís"Més informacióMés informació

Ara es mostren els items 24-43 de 56

    • Database integrated analytics using R : initial experiences with SQL-Server + R 

      Berral García, Josep Lluís; Poggi, Nicolas (2016)
      Comunicació de congrés
      Accés obert
      Most data scientists use nowadays functional or semi-functional languages like SQL, Scala or R to treat data, obtained directly from databases. Such process requires to fetch data, process it, then store again, and such ...

    • Database Integrated Analytics Using R: Initial Experiences with SQL-Server + R 

      Berral García, Josep Lluís; Poggi, Nicolas (Institute of Electrical and Electronics Engineers (IEEE), 2017-02-02)
      Comunicació de congrés
      Accés obert
      Most data scientists use nowadays functional or semi-functional languages like SQL, Scala or R to treat data, obtained directly from databases. Such process requires to fetch data, process it, then store again, and such ...

    • Discovering ship navigation patterns towards environmental impact modeling 

      Gutiérrez, Alberto; Buchaca, David; Berral García, Josep Lluís (Barcelona Supercomputing Center, 2017-05-04)
      Text en actes de congrés
      Accés obert
      In this work a data pipe-line to manage and extract patterns from time-series is described. The patterns found with a combination of Conditional Restricted Boltzmann Machine (CRBM) and k-Means algorithms are then validated ...

    • Distributing deep learning hyperparameter tuning for 3D medical image segmentation 

      Berral García, Josep Lluís; Aranda Llorens, Oriol; Domínguez Bermúdez, Juan Luis; Torres Viñals, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      Most research on novel techniques for 3D Medical Image Segmentation (MIS) is currently done using Deep Learning with GPU accelerators. The principal challenge of such technique is that a single input can easily cope computing ...

    • Empowering automatic data-center management with machine learning 

      Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2013)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The Cloud as computing paradigm has become nowadays crucial for most Internet business models. Managing and optimizing its performance on a moment-by-moment basis is not easy given as the amount and diversity of elements ...

    • Empowering automatic data-center management with machine learning 

      Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2013)
      Report de recerca
      Accés obert
      The Cloud as computing paradigm has become nowadays crucial for most Internet business models. Managing a cloud and optimizing its performance on a moment-by-moment basis is not easy given as the amount and diversity of ...

    • Energy-aware scheduling in virtualized datacenters 

      Goiri Presa, Íñigo; Julià Massó, Ferran; Nou Castell, Ramon; Berral García, Josep Lluís; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010)
      Text en actes de congrés
      Accés obert
      The reduction of energy consumption in large-scale datacenters is being accomplished through an extensive use of virtualization, which enables the consolidation of multiple workloads in a smaller number of machines. ...

    • Energy-efficient and multifaceted resource management for profit-driven virtualized data centers 

      Goiri Presa, Íñigo; Berral García, Josep Lluís; Fitó, Josep Oriol; Julià Massó, Ferran; Nou Castell, Ramon; Guitart Fernández, Jordi; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (Elsevier, 2012-05)
      Article
      Accés restringit per política de l'editorial
      As long as virtualization has been introduced in data centers, it has been opening new chances for resource management. Nowadays, it is not just used as a tool for consolidating underused nodes and save power; it also ...

    • Floki: a proactive data forwarding system for direct inter-function communication for serverless workflows 

      Nestorov, Anna Maria; Berral García, Josep Lluís; Misale, Claudia; Wang, Chen; Carrera Pérez, David; Youssef, Alaa (Association for Computing Machinery (ACM), 2022)
      Text en actes de congrés
      Accés obert
      Serverless computing emerges as an architecture choice to build and run containerized data-intensive pipelines. It leaves the tedious work of infrastructure management and operations to the cloud provider, allowing developers ...

    • Improved self-management of datacenter systems applying machine learning 

      Berral García, Josep Lluís (Universitat Politècnica de Catalunya, 2013-11-22)
      Tesi
      Accés obert
      Autonomic Computing is a Computer Science and Technologies research area, originated during mid 2000's. It focuses on optimization and improvement of complex distributed computing systems through self-control and ...

    • Improving maritime traffic emission estimations on missing data with CRBMs 

      Gutiérrez Torre, Alberto; Berral García, Josep Lluís; Buchaca Prats, David; Guevara Vilardell, Marc; Soret, Albert; Carrera Pérez, David (Elsevier, 2020-07-07)
      Article
      Accés obert
      Maritime traffic emissions are a major concern to governments as they heavily impact the Air Quality in coastal cities. Ships use the Automatic Identification System (AIS) to continuously report position and speed among ...

    • J2EE instrumentation for software aging root cause application component determination with AspectJ 

      Alonso López, Javier; Torres Viñals, Jordi; Berral García, Josep Lluís; Gavaldà Mestre, Ricard (IEEE Computer Society Publications, 2010-04-23)
      Text en actes de congrés
      Accés obert
      Unplanned system outages have a negative impact on company revenues and image. While the last decades have seen a lot of efforts from industry and academia to avoid them, they still happen and their impact is increasing. ...

    • Large-scale video analytics through object-level consolidation 

      Rivas Barragan, Daniel; Guim Bernat, Francesc; Polo Bardés, Jorda; Berral García, Josep Lluís; Carrera Pérez, David (Springer, 2022)
      Text en actes de congrés
      Accés obert
      As the number of installed cameras grows, so do the compute resources required to process and analyze all the images captured by these cameras. Video analytics enables new use cases, such as smart cities or autonomous ...

    • "Living in Barcelona" Li-BCN workload 2010 

      Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2011)
      Report de recerca
      Accés obert
      Nowadays lots of Internet users are clients of web hosting companies, willing to offer their web services, store their content, or just publish their web sites on the network. This has made the hosting companies to use big ...

    • Modeling cloud resources using machine learning 

      Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2013)
      Report de recerca
      Accés obert
      Cloud computing is a new Internet infrastructure paradigm where management optimization has become a challenge to be solved, as all current management systems are human-driven or ad-hoc automatic systems that must be tuned ...

    • MScheduler: leveraging spot instances for high-performance reservoir simulation in the cloud 

      Albuquerque Portella, Felipe; Estrela, Paulo J.B.; Malini, Renzo Q.; Teylo, Luan; Berral García, Josep Lluís; Drummond, Lúcia M.A. (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      Petroleum reservoir simulation uses computer models to predict fluid flow in porous media, aiding to forecast oil production. Engineers execute numerous simulations with different geological realizations to refine the ...

    • Multifaceted resource management for dealing with heterogeneous workloads in virtualized data centers 

      Goiri Presa, Íñigo; Fitó, Josep Oriol; Julià Masso, Ferran; Nou Castell, Ramon; Berral García, Josep Lluís; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010)
      Comunicació de congrés
      Accés obert
      As long as virtualization has been introduced in data centers, it has been opening new chances for resource management. Now, it is not just used as a tool for consolidating underused nodes and save power, it also allows ...

    • Power-aware multi-data center management using machine learning 

      Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2013)
      Text en actes de congrés
      Accés obert
      The cloud relies upon multi-datacenter (multi-DC) infrastructures distributed along the world, where people and enterprises pay for resources to offer their web-services to worldwide clients. Intelligent management is ...

    • Proactive container auto-scaling for cloud native machine learning services 

      Buchaca Prats, David; Berral García, Josep Lluís; Wang, Chen; Youssef, Alaa (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Comunicació de congrés
      Accés obert
      Understanding the resource usage behaviors of the ever-increasing machine learning workloads are critical to cloud providers offering Machine Learning (ML) services. Capable of auto-scaling resources for customer workloads ...

    • Real-time data center's telemetry reduction and reconstruction using Markov chain models 

      Baig, Shuja-ur-Rehman; Iqbal, Waheed; Berral García, Josep Lluís; Erradi, Abdelkarim; Carrera Pérez, David (2019-12)
      Article
      Accés obert
      Large-scale data centers are composed of thousands of servers organized in interconnected racks to offer services to users. These data centers continuously generate large amounts of telemetry data streams (e.g., hardware ...