Cristina Rossi

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The paper discusses three key economic problems raised by the emergence and diffusion of Open source software: motivation, coordination, and diffusion under a dominant standard. First, the movement took off through the activity of a software development community that deliberately did not follow profit motivations. Second, a hierarchical coordination(More)
The paper analyses the entry strategies of software firms that adopt the Open Source production model. A new definition of business model is proposed. Empirical evidence, based on an exploratory survey taken on 146 Italian software firms * , shows that firms adapted to an environment dominated by incumbent standards by combining Open Source and proprietary(More)
A growing body of economic literature is addressing the issue of incentives for individuals who take part in the Open Source Software (OSS) movement, while empirical analyses focus on individual developers but neglect firms that do business with it. During 2002, we conducted a large-scale survey on 146 Italian firms supplying OSS in Italy and this paper(More)
PURPOSE To develop a reliable technique for diffusion imaging of the human spinal cord at 1.5 Tesla and to assess potential differences in diffusion anisotropy in cross-sectional images. MATERIALS AND METHODS A single-shot echo-planar imaging sequence with double spin-echo diffusion preparation was optimized regarding cerebrospinal fluid artifacts,(More)
BACKGROUND Pediatric cancers are a feature in patients with Li-Fraumeni syndrome and its variant Li-Fraumeni-like syndrome (LFS/LFL). To the best of the authors' knowledge, TP53 germline mutations are currently the only molecular defect known to be associated with this disease. Recently, a specific germline mutation in this gene, p.R337H, has been reported(More)
This study aimed to assess the usefulness and advantages of multiplanar reformations (MPR) during multidetector-row computed tomography (MDCT)-guided percutaneous fine-needle aspiration biopsy (FNAB) and core biopsy of retroperitoneal lesions that are difficult to access with the guidance of ultrasound and axial CT alone owing to overlying bony structures,(More)
OBJECTIVE The objective of this study was to prospectively compare the detection rate, the location, and the size of pulmonary nodules in low-dose computed tomography (CT) and in magnetic resonance (MR) imaging with a 3-dimensional (3D) dual-echo gradient-echo (GRE) pulse sequence using a trimodality positron emission tomography (PET)/CT-MR setup. METHODS(More)
Solitary fibrous tumor (SFT) is a rare mesenchymal neoplasm, most commonly arising from the pleura. It has also been recently described to occur in extrapleural sites. To our knowledge, only 16 cases of SFT have been reported in the urinary bladder to date. We report the clinicopathological features of a vesical SFT occurring in a 60-year-old man who(More)
The aim of this study was to quantitatively assess the field strength dependence of the transverse relaxation rate (R(2) *) change in cortical gray matter induced by hyperoxia and hyperoxic hypercapnia versus normoxia in an intra-individual comparison of young healthy volunteers. Medical air (21% O(2) ), pure oxygen and carbogen (95% O(2) , 5% CO(2) ) were(More)