octubre 23, 2020

IEEE ICNP 2020 se reunió del 13 al 16 de octubre. Por primera vez en sus 28 años de historia,...

On October 13 through 16, IMDEA Networks Institute will host IEEE ICNP 2020, the 28th annual edition of the IEEE...

julio 8, 2020

El proyecto denominado CoronaSurveys para “Medir el iceberg” partió de la idea de que hay una punta del iceberg que...

mayo 29, 2020

Antonio Fernández Anta ha participado en una de las “MBA Talks” del centro académico canario MBA Business School: “Big Data &...

abril 24, 2020

Con la COVID-19 azotando todas las áreas de nuestras vidas, existe una necesidad tanto social como política por saber cuál...

abril 2, 2020

Para gestionar adecuadamente la pandemia de Covid-19, los gobiernos y los científicos que los asesoran necesitan datos lo más reales...

Despite the hype about blockchains and distributed ledgers, no formal abstraction of these objects has been proposed. To face this issue, in this paper we provide a proper formulation of a distributed ledger object. In brief, we define a ledger object as a sequence of records, and we provide the operations and the properties that such an object should support. 

We consider online task computing environments such as volunteer computing platforms running on BOINC (e.g., SETI@home) and crowdsourcing platforms such as Amazon’s Mechanical Turk. We model the computations as an Internet-based task computing system under the master-worker paradigm. A master entity sends tasks across the Internet, to worker entities willing to perform a computational task. 

Everyone is familiar with the problem of online scheduling, even if they are not aware of it; from the way we prioritize our everyday decisions to the way a delivery service must decide on the route to follow in order to cover the ongoing requests. In computer science this is a problem of even greater importance.

Cellular service providers have been struggling with users’ demand since the emergence of mobile Internet. As a result, each generation of cellular network prevailed over its predecessors mainly in terms of connection speed.