Self-adjusting P2P and Grid Systems - Reupholster an armchair

Self-adjusting P2P and Grid Systems. Ref. TIN2007-68050-C03

P2PGRID project is focused on the design of innovative large scale distributed systems, decentralized, able to adapt to complex environments – in terms of infrastructure or use- and heterogeneous in the access to communication and computation resources.

A key goal is the use of economic algorithms in order to create a Grid infrastructure with efficient resource allocation mechanisms. It is thus necessary the study, design, and evaluation of resource allocation algorithms in distributed computation systems. Such systems must take into account several variables --like client demand, resource state and availability, and the competition among services—to provide decentralized and autonomous system adaptivity.

Another important objective is the creation of a peer-to-peer middleware infrastructure providing advanced services as indirection, resource location, content distribution and access, and efficient communication channels for scalable group communication. We will also design novel programming abstractions for constructing fault-tolerant wide-area applications on top of the infrastructure. We outline three main research challenges: the design of adaptive and self-adjusting mechanisms for heterogeneous resources and environments, the convergence of Web, P2P and Grid systems, and the future support for millions of mobile devices (local/global access).

P2PGRID merges researchers in the Grid and peer-to-peer settings in order to achieve constructive synergies between efficient resource assignment algorithms and scalable routing and data distribution techniques available in both approaches. The unifying e-services frame enables the construction of generic infrastructures capable of solving problems in contexts of applications adapted to context/ambient, collaborative work or distributed wide-area services.

P2PGrid Members

Universitat Politècnica de Catalunya (UPC) (TIN2007-68050-C03-01)
Leandro Navarro Moldes (PhD)
Felix Freitag (PhD)
Antonia Gallardo Gómez

P2PGrid Publications

P2PGrid Meetings

Meeting Barcelona (UPC Campus Nord, C6-220)

Jueves mañana (10:00 -13:00)
9:30h Breve presentación del estado del proyecto (Oscar, Pedro, Leandro) y discusión (todos)
Presentaciones de avances:
Breve Presentacion ULabGrid2 (5min; Oscar)
Breve Presentación HGrid (5 min; Antonia)
Objetivo: colaboraciones evaluar DHTs, comparar DHTs versus HGrid, ¿paper con resultados?, ¿dónde intentar publicar?, ect.
Breve Presentación sobre P2P Backup (5 min; LLuis)
Breve Presentación sobre DAOP-P2P (5 min; Ruben)
Breve Presentación jOLSR y OMLSR (5 min; Pedro)
Breve Presentacion Collectives (15 min,


Tal vez podria ser interesante que publicasemos la parte de nuestra red social que pueda tener relación con el proyecto. En linkedin muchos de nosotros tenemos varios contactos, pero algunos no tienen

Upholster an armchair

retapisser un fauteuil

The technique of upholstering an armchair (in french) is not exactly difficult, but it does require patience and a lot of elbow grease. Follow our little tips!

  1. The necessary equipment
    A thick cloth, scissors, brushed aluminum nails, an upholstery hammer, 12 mm seeds and a pair of pliers.
    Give a new lease of life to your armchair by renovating the fabric that covers it. Here are the steps to follow!

  2. Remove the old coating
    Find the beginning of the braid and shoot it. Remove staples and seeds with a spike or pair of pliers.

  3. Cut the new coating
    Note the dimensions of your chair: the backrest, the armrest and the seat. Transcribe the dimensions on your new fabric, lay over the old coverings to get an idea of ​​the shape to cut. Increase the measurements by 20 cm for the backrest and 10 cm for the armrests.

  4. The seat
    Center the fabric, point it (place the small upholstery nails) on the front and do the same for the back and sides.
    When finished, return to the front of the chair and remove the pointed seeds, then stretch the fabric well. Tap again by repeating the same steps.

  5. The armrests
    Place the fabric on the armrest and pinch it to get a rounded shape. Secure with seeds.

  6. The file
    From the top of the backrest, stretch the fabric and anchor it with the seeds. Pull down and secure with the seeds. Come back to the top, strain a second time, then point.

  7. The finish
    Cut the fabric around the edge of the backrest and seat 1 cm from the seeds. Remove the seeds, fold the fabric inside and replace the seeds each time. Then replace the latter with brushed aluminum nails. Remove each seed one at a time and hammer in a nail instead. Place the nails side by side without overlapping them.

remplacer le tissu d'un fauteuil