Publications de Juan Andrei Villarroel Fernandez

The Dark Energy Survey: Data Release 1

Eduardo Sanchez, Xin Chen, Vanda Carla Costa Grisel, Aaron James Rossini, Yi Zhang, Jonathan Andrew Blazek, Jennifer Kaitlyn Olsen, Xi Chen, Augusto Martins Lima, Juan Andrei Villarroel Fernandez

We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single-epoch images, co-added images, co-added source catalogs, and associated products and services assembled over the first 3 yr of DES science operations ...

IOP PUBLISHING LTD2018

Dark Energy Survey Year 1 Results: A Precise H-0 Estimate from DES Y1, BAO, and D/H Data

Eduardo Sanchez, Aaron James Rossini, Jonathan Andrew Blazek, Augusto Martins Lima, Juan Andrei Villarroel Fernandez, Craig Matthew Smith

We combine Dark Energy Survey Year 1 clustering and weak lensing data with baryon acoustic oscillations and Big Bang nucleosynthesis experiments to constrain the Hubble constant. Assuming a flat Lambda CDM model with minimal neutrino mass (Sigma m(v), = 0. ...

OXFORD UNIV PRESS2018

Innovation and learning performance implications of free revealing and knowledge brokering in competing communities: insights from the Netflix Prize challenge

Christopher Tucci, Juan Andrei Villarroel Fernandez

Firms increasingly use open competitions to extend their innovation process and access new diverse knowledge. The Netflix Prize case we study in this paper is a multi-stage repeat-submission open competition involving the creation of new knowledge from acr ...

Springer2013

Simulating Learning Dynamics in Project Networks

Juan Andrei Villarroel Fernandez

In this paper we develop a multiagent simulation model to explore the impact of learning dynamics on the productive implementation of innovations in project networks comprised of designers and contractors. Though researchers generally agree that when firms ...

2009

Open source corporate strategy (OSCS) : unveiling the firm's open sources of competitive advantage

Juan Andrei Villarroel Fernandez

This doctoral dissertation defines and sheds light on a nascent phenomenon in management, informally referred to as "crowdsourcing". I term this concept Open Source Corporate Strategy, or OSCS, which borrows insights from the open source innovation literat ...

EPFL2008

Open Source Corporate Strategy (OSCS): Reaching outside the firm’s boundaries to tap upon global talent

Christopher Tucci, Juan Andrei Villarroel Fernandez

We propose a new concept, OSCS, seeking to explain the process by which the firm incorporates open source principles into its business model, as an effective diversification strategy to gain and sustain competitive advantage, in the context of a globally i ...

2007

An agent-based approach to examine the ‘network knowledge advantage’ in open innovation networks: Firm openness and interorganizational network performance

Juan Andrei Villarroel Fernandez

In this paper we present the results of an agent-based model of open innovation, which suggest the network knowledge advantage underlying open interfirm networks of innovation, as opposed to an advantage arising from the interfirm network structure. To dat ...

2007

What is Open Source Corporate Strategy (OSCS) ? : The firm’s strategic perspective on open source

Christopher Tucci, Juan Andrei Villarroel Fernandez

OSCS is a new concept signifying the process by which the firm incorporates open source principles into its business model, as an effective diversification strategy to gain and sustain competitive advantage, in the context of a globally interconnected soci ...

2007

Simulating learning in interorganizational networks: The insidious role of task interdependence and relational instability in system-level learning

Juan Andrei Villarroel Fernandez

In this paper we develop a multi-agent simulation model to explore the issue of learning in interorganizational networks. Though interorganizational network researchers generally agree that when firms form into networks they will gain access to new knowled ...

2006