Multiplatform Reactive Crowdsourcing based on Social Networks – WWW2013

In this post I want to report on our paper on Reactive Crowdsourcing presented at the WWW 2013 conference in Rio de Janeiro, Brasil.

Here is a quick summary of motivation and idea, together with some relevant materials:

Need for control

We believe that an essential aspect for building effective crowdsourcing computations is the ability of “controlling the crowd”, i.e. of dynamically adapting the behaviour of the crowdsourcing systems as response to the quantity and quality of completed tasks or to the availability and reliability of performers.
This new paper focuses on a machinery and methodology for deploying configurable, cross-platform, and adaptive crowdsourcing campaigns through a model-driven approach.

Control through declarative active rules

In the paper we present an approach to crowdsourcing which provides powerful and flexible crowd controls. We model each crowdsourcing application as composition of elementary task types and we progressively transform these high level specifications into the features of a reactive execution environment that supports task planning, assignment and completion as well as performer monitoring and exclusion. Controls are specified as declarative, active rules on top of data structures which are derived from the model of the application; rules can be added, dropped or modified, thus  guaranteeing maximal exibility with limited effort. The paper applies modeling practices (as also explained in our book on model-driven software engineering).

Here is the presentation thatAlessandro Bozzon gave at WWW 2013:

Reactive crowdsourcing presentation on slideshare.

Prototype and experiments

We have a prototype platform that implements the proposed framework.  We have done extensive experiments with it. Our experimentations with different rule sets demonstrate how simple changes to the rules can substantially affect time, effort and quality involved in crowdsourcing activities.

Here is a short video demonstrating our approach through the current prototype (mainly centered on the crowdsourcing campaign configuration phase):

Paper and related activities

The paper can be downloaded for free from the ACM Digital Library through this link: (or alternatively from the WWW site)

The paper is a follow-up of our WWW2012 paper on Crowdsearcher, which focused on exploiting social networks and crowdsourcing platforms for improving search.
The paper nicely combines with another recent contribution of ours, presented at EDBT 2013, on finding the right crowd of experts on social networks for addressing a specific problem.

To keep updated on my activities you can subscribe to the RSS feed of my blog or follow my twitter account (@MarcoBrambi).

"My" events for 2012

Well, this year I’m involved in the organization of so many events that it’s worth (for myself) to track them down in a single blog post, so as to keep track of all the activities and places I’ll be experiencing.
I’m reporting here all the events, just for sake of recording (and for anybody to browse):

  1. SocialBPM summer school in Como, July 2012
  2. CrowdSearch workshop at WWW 2012
  3. International Conference on Web Engineering (ICWE 2012)
  4. Model-driven Web Engineering workshop (MDWE 2012) at ICWE 2012
  5. Very Large Data Search workshop (VLDS 2012) at VLDB 2012
  6. CloudMDE workshop at ECMFA 2012
  7. SOHuman 2012 workshop at SocialCom 2012
  8. VORTE 2012 workshop at EDOC 2012
.. and a few others. This is not the full list of the events I’ll be attending though (which includes some more).
I especially recommend to look into the Social BPM summer school:

To keep updated on my activities you can subscribe to the RSS feed of my blog or follow my twitter account (@MarcoBrambi).

CrowdSearch 2012: my experience at the First International Workshop On Crowdsourcing Web Search at WWW2012

To keep updated on my activities you can subscribe to the RSS feed of my blog or follow my twitter account (@MarcoBrambi).

CUbRIK: content-intensive, time-intensive and human-intensive scalable search

Today I wish to share with you some details about a new project I’ll be involved in throughout the next three years. The project is called CUbRIK and addresses advanced search techniques and tools for multimedia and multimodal search, based on content-intensive, time-intensive and human-intensive scalable processes.

The project aims at experimenting the integration of machine tasks and a variety of human and crowd-sourced tasks, orchestrated by programmable pipelines. The obtained processes will allow content processing, query submission and result computation, relevance feedback processing.
CUbRIK will allow complex search on the web and on enterprise content, by encompassing entity-, time-, and space- aware search functions. This means that people will be able to search for multimedia contents that include specific reference to objects, temporal information or locations. This will be possible because CUbRIK will exploit highly accurate repositories of spatio-temporal entities (locations, events, trends, and so on), correlated through rich semantic associations.
I will participate in the joint research unit of Politecnico di Milano and WebRatio on this, lead by Piero Fraternali.
The project is meant to be the continuation of a successful experience with the Pharos research project. The project will have significant synergies with the Search Computing project and with the topics of crowdsourcing and social web addressed within the BPM4People project.

Here is an introduction video on CUbRIK:

You can find more on this in my interview on the WebRatio site and on the official CUbRIK site I’ll keep you posted on the outcomes of the project.

To keep updated on my activities you can subscribe to the RSS feed of my blog or follow my twitter account (@MarcoBrambi).